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Ukraine’s port of Mariupol holds out against all odds

FILE - A local resident walks past a damaged vehicle marked with the letter Z, which has become a symbol of the Russian military, in an area that Russian-backed separatists claim to control in the Ukraine city of Mariupol, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - An armed serviceman of Donetsk People's Republic militia walks past a building damaged during fighting in Mariupol, on the territory which is now under the Government of the Donetsk People's Republic control, eastern in Mariupol, Ukraine, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - A building damaged during fighting is seen in Mariupol, Ukraine, on April 13, 2022. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Alexei Alexandrov, File) FILE - A view inside the Mariupol theater damaged during fighting in Mariupol, in territory under the government of the Donetsk People's Republic, eastern Ukraine, Monday, April 4, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Damage is seen on apartment buildings after shelling from fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Ukrainian emergency employees and volunteers carry an injured pregnant woman from a maternity hospital damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. The woman and her baby later died. (AP Photo/Evgeniy Maloletka, File) FILE - A man rides his bicycle past a body covered by a rug after fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Premature babies who were left behind by their parents lay in a bed in hospital number 3 in Mariupol, Ukraine, Tuesday, March 15, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Marianna Vishegirskaya stands outside a maternity hospital that was damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. (AP Photo/Mstyslav Chernov, File) FILE - People look at a burning apartment building in a yard after shelling in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A woman reacts as she stands with her daughter as she waits for her husband to evacuate from a burning apartment in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A Ukrainian serviceman guards his position in Mariupol, Ukraine, Saturday, March 12, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Mstyslav Chernov, File) FILE - A fire burns at an apartment building after it was hit by the shelling of a residential district in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Mstyslav Chernov, File) FILE - A man walks with harbor cranes in the background, at the trade port in Mariupol, Ukraine, Wednesday, Feb. 23, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - Serhiy Kralya, 41, looks at the camera after surgery at a hospital in Mariupol, eastern Ukraine on Friday, March 11, 2022. Kralya was injured during shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - Russian's army tanks move down a street on the outskirts of Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Dead bodies are placed into a mass grave on the outskirts of Mariupol, Ukraine, Wednesday, March 9, 2022 as people cannot bury their dead because of the heavy shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - A body lies covered by a tarp in the street in Mariupol, Ukraine, Monday, March 7, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A man plays with a baby in a bomb shelter in Mariupol, Ukraine, Sunday, March 6, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise after shelling by Russian forces in Mariupol, Ukraine, Friday, March 4, 2022.(AP Photo/Evgeniy Maloletka, File) FILE - Marina Yatsko, left, runs behind her boyfriend Fedor carrying her 18 month-old son Kirill who was killed in shelling, as they arrive at a hospital in Mariupol, Ukraine, Friday, March 4, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise from an air defence base in the aftermath of an apparent Russian strike in Mariupol, Ukraine, Thursday, Feb. 24, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - The lifeless body of a girl killed during the shelling of a residential area lies on a medical cart at the city hospital of Mariupol, eastern Ukraine, Sunday, Feb. 27, 2022. (AP Photo/Evgeniy Maloletka) FILE - A metallurgical plant is seen on the outskirts of the city of Mariupol, Ukraine, Thursday, Feb. 24, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - A hospital window is cracked from shelling in Mariupol, Ukraine, Thursday, March 3, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Evgeniy Maloletka) FILE - An explosion is seen in an apartment building after Russian's army tank fires in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A local resident walks past a damaged vehicle marked with the letter Z, which has become a symbol of the Russian military, in an area that Russian-backed separatists claim to control in the Ukraine city of Mariupol, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - An armed serviceman of Donetsk People's Republic militia walks past a building damaged during fighting in Mariupol, on the territory which is now under the Government of the Donetsk People's Republic control, eastern in Mariupol, Ukraine, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - A building damaged during fighting is seen in Mariupol, Ukraine, on April 13, 2022. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Alexei Alexandrov, File) FILE - A view inside the Mariupol theater damaged during fighting in Mariupol, in territory under the government of the Donetsk People's Republic, eastern Ukraine, Monday, April 4, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Damage is seen on apartment buildings after shelling from fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Ukrainian emergency employees and volunteers carry an injured pregnant woman from a maternity hospital damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. The woman and her baby later died. (AP Photo/Evgeniy Maloletka, File) FILE - A man rides his bicycle past a body covered by a rug after fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Premature babies who were left behind by their parents lay in a bed in hospital number 3 in Mariupol, Ukraine, Tuesday, March 15, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Marianna Vishegirskaya stands outside a maternity hospital that was damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. (AP Photo/Mstyslav Chernov, File) FILE - People look at a burning apartment building in a yard after shelling in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A woman reacts as she stands with her daughter as she waits for her husband to evacuate from a burning apartment in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A Ukrainian serviceman guards his position in Mariupol, Ukraine, Saturday, March 12, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Mstyslav Chernov, File) FILE - A fire burns at an apartment building after it was hit by the shelling of a residential district in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Mstyslav Chernov, File) FILE - A man walks with harbor cranes in the background, at the trade port in Mariupol, Ukraine, Wednesday, Feb. 23, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - Serhiy Kralya, 41, looks at the camera after surgery at a hospital in Mariupol, eastern Ukraine on Friday, March 11, 2022. Kralya was injured during shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - Russian's army tanks move down a street on the outskirts of Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Dead bodies are placed into a mass grave on the outskirts of Mariupol, Ukraine, Wednesday, March 9, 2022 as people cannot bury their dead because of the heavy shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - A body lies covered by a tarp in the street in Mariupol, Ukraine, Monday, March 7, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A man plays with a baby in a bomb shelter in Mariupol, Ukraine, Sunday, March 6, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise after shelling by Russian forces in Mariupol, Ukraine, Friday, March 4, 2022.(AP Photo/Evgeniy Maloletka, File) FILE - Marina Yatsko, left, runs behind her boyfriend Fedor carrying her 18 month-old son Kirill who was killed in shelling, as they arrive at a hospital in Mariupol, Ukraine, Friday, March 4, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise from an air defence base in the aftermath of an apparent Russian strike in Mariupol, Ukraine, Thursday, Feb. 24, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - The lifeless body of a girl killed during the shelling of a residential area lies on a medical cart at the city hospital of Mariupol, eastern Ukraine, Sunday, Feb. 27, 2022. (AP Photo/Evgeniy Maloletka) FILE - A metallurgical plant is seen on the outskirts of the city of Mariupol, Ukraine, Thursday, Feb. 24, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - A hospital window is cracked from shelling in Mariupol, Ukraine, Thursday, March 3, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Evgeniy Maloletka) FILE - An explosion is seen in an apartment building after Russian's army tank fires in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A local resident walks past a damaged vehicle marked with the letter Z, which has become a symbol of the Russian military, in an area that Russian-backed separatists claim to control in the Ukraine city of Mariupol, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - An armed serviceman of Donetsk People's Republic militia walks past a building damaged during fighting in Mariupol, on the territory which is now under the Government of the Donetsk People's Republic control, eastern in Mariupol, Ukraine, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - A building damaged during fighting is seen in Mariupol, Ukraine, on April 13, 2022. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Alexei Alexandrov, File) FILE - A view inside the Mariupol theater damaged during fighting in Mariupol, in territory under the government of the Donetsk People's Republic, eastern Ukraine, Monday, April 4, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Damage is seen on apartment buildings after shelling from fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Ukrainian emergency employees and volunteers carry an injured pregnant woman from a maternity hospital damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. The woman and her baby later died. (AP Photo/Evgeniy Maloletka, File) FILE - A man rides his bicycle past a body covered by a rug after fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Premature babies who were left behind by their parents lay in a bed in hospital number 3 in Mariupol, Ukraine, Tuesday, March 15, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Marianna Vishegirskaya stands outside a maternity hospital that was damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. (AP Photo/Mstyslav Chernov, File) FILE - People look at a burning apartment building in a yard after shelling in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A woman reacts as she stands with her daughter as she waits for her husband to evacuate from a burning apartment in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A Ukrainian serviceman guards his position in Mariupol, Ukraine, Saturday, March 12, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Mstyslav Chernov, File) FILE - A fire burns at an apartment building after it was hit by the shelling of a residential district in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Mstyslav Chernov, File) FILE - A man walks with harbor cranes in the background, at the trade port in Mariupol, Ukraine, Wednesday, Feb. 23, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - Serhiy Kralya, 41, looks at the camera after surgery at a hospital in Mariupol, eastern Ukraine on Friday, March 11, 2022. Kralya was injured during shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - Russian's army tanks move down a street on the outskirts of Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Dead bodies are placed into a mass grave on the outskirts of Mariupol, Ukraine, Wednesday, March 9, 2022 as people cannot bury their dead because of the heavy shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - A body lies covered by a tarp in the street in Mariupol, Ukraine, Monday, March 7, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A man plays with a baby in a bomb shelter in Mariupol, Ukraine, Sunday, March 6, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise after shelling by Russian forces in Mariupol, Ukraine, Friday, March 4, 2022.(AP Photo/Evgeniy Maloletka, File) FILE - Marina Yatsko, left, runs behind her boyfriend Fedor carrying her 18 month-old son Kirill who was killed in shelling, as they arrive at a hospital in Mariupol, Ukraine, Friday, March 4, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise from an air defence base in the aftermath of an apparent Russian strike in Mariupol, Ukraine, Thursday, Feb. 24, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - The lifeless body of a girl killed during the shelling of a residential area lies on a medical cart at the city hospital of Mariupol, eastern Ukraine, Sunday, Feb. 27, 2022. (AP Photo/Evgeniy Maloletka) FILE - A metallurgical plant is seen on the outskirts of the city of Mariupol, Ukraine, Thursday, Feb. 24, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - A hospital window is cracked from shelling in Mariupol, Ukraine, Thursday, March 3, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Evgeniy Maloletka) FILE - An explosion is seen in an apartment building after Russian's army tank fires in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A local resident walks past a damaged vehicle marked with the letter Z, which has become a symbol of the Russian military, in an area that Russian-backed separatists claim to control in the Ukraine city of Mariupol, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - An armed serviceman of Donetsk People's Republic militia walks past a building damaged during fighting in Mariupol, on the territory which is now under the Government of the Donetsk People's Republic control, eastern in Mariupol, Ukraine, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - A building damaged during fighting is seen in Mariupol, Ukraine, on April 13, 2022. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Alexei Alexandrov, File) FILE - A view inside the Mariupol theater damaged during fighting in Mariupol, in territory under the government of the Donetsk People's Republic, eastern Ukraine, Monday, April 4, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Damage is seen on apartment buildings after shelling from fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Ukrainian emergency employees and volunteers carry an injured pregnant woman from a maternity hospital damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. The woman and her baby later died. (AP Photo/Evgeniy Maloletka, File) FILE - A man rides his bicycle past a body covered by a rug after fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Premature babies who were left behind by their parents lay in a bed in hospital number 3 in Mariupol, Ukraine, Tuesday, March 15, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Marianna Vishegirskaya stands outside a maternity hospital that was damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. (AP Photo/Mstyslav Chernov, File) FILE - People look at a burning apartment building in a yard after shelling in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A woman reacts as she stands with her daughter as she waits for her husband to evacuate from a burning apartment in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A Ukrainian serviceman guards his position in Mariupol, Ukraine, Saturday, March 12, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Mstyslav Chernov, File) FILE - A fire burns at an apartment building after it was hit by the shelling of a residential district in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Mstyslav Chernov, File) FILE - A man walks with harbor cranes in the background, at the trade port in Mariupol, Ukraine, Wednesday, Feb. 23, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - Serhiy Kralya, 41, looks at the camera after surgery at a hospital in Mariupol, eastern Ukraine on Friday, March 11, 2022. Kralya was injured during shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - Russian's army tanks move down a street on the outskirts of Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Dead bodies are placed into a mass grave on the outskirts of Mariupol, Ukraine, Wednesday, March 9, 2022 as people cannot bury their dead because of the heavy shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - A body lies covered by a tarp in the street in Mariupol, Ukraine, Monday, March 7, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A man plays with a baby in a bomb shelter in Mariupol, Ukraine, Sunday, March 6, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise after shelling by Russian forces in Mariupol, Ukraine, Friday, March 4, 2022.(AP Photo/Evgeniy Maloletka, File) FILE - Marina Yatsko, left, runs behind her boyfriend Fedor carrying her 18 month-old son Kirill who was killed in shelling, as they arrive at a hospital in Mariupol, Ukraine, Friday, March 4, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise from an air defence base in the aftermath of an apparent Russian strike in Mariupol, Ukraine, Thursday, Feb. 24, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - The lifeless body of a girl killed during the shelling of a residential area lies on a medical cart at the city hospital of Mariupol, eastern Ukraine, Sunday, Feb. 27, 2022. (AP Photo/Evgeniy Maloletka) FILE - A metallurgical plant is seen on the outskirts of the city of Mariupol, Ukraine, Thursday, Feb. 24, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - A hospital window is cracked from shelling in Mariupol, Ukraine, Thursday, March 3, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Evgeniy Maloletka) FILE - An explosion is seen in an apartment building after Russian's army tank fires in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A local resident walks past a damaged vehicle marked with the letter Z, which has become a symbol of the Russian military, in an area that Russian-backed separatists claim to control in the Ukraine city of Mariupol, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - An armed serviceman of Donetsk People's Republic militia walks past a building damaged during fighting in Mariupol, on the territory which is now under the Government of the Donetsk People's Republic control, eastern in Mariupol, Ukraine, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - A building damaged during fighting is seen in Mariupol, Ukraine, on April 13, 2022. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Alexei Alexandrov, File) FILE - A view inside the Mariupol theater damaged during fighting in Mariupol, in territory under the government of the Donetsk People's Republic, eastern Ukraine, Monday, April 4, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Damage is seen on apartment buildings after shelling from fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Ukrainian emergency employees and volunteers carry an injured pregnant woman from a maternity hospital damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. The woman and her baby later died. (AP Photo/Evgeniy Maloletka, File) FILE - A man rides his bicycle past a body covered by a rug after fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Premature babies who were left behind by their parents lay in a bed in hospital number 3 in Mariupol, Ukraine, Tuesday, March 15, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Marianna Vishegirskaya stands outside a maternity hospital that was damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. (AP Photo/Mstyslav Chernov, File) FILE - People look at a burning apartment building in a yard after shelling in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A woman reacts as she stands with her daughter as she waits for her husband to evacuate from a burning apartment in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A Ukrainian serviceman guards his position in Mariupol, Ukraine, Saturday, March 12, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Mstyslav Chernov, File) FILE - A fire burns at an apartment building after it was hit by the shelling of a residential district in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Mstyslav Chernov, File) FILE - A man walks with harbor cranes in the background, at the trade port in Mariupol, Ukraine, Wednesday, Feb. 23, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - Serhiy Kralya, 41, looks at the camera after surgery at a hospital in Mariupol, eastern Ukraine on Friday, March 11, 2022. Kralya was injured during shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - Russian's army tanks move down a street on the outskirts of Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Dead bodies are placed into a mass grave on the outskirts of Mariupol, Ukraine, Wednesday, March 9, 2022 as people cannot bury their dead because of the heavy shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - A body lies covered by a tarp in the street in Mariupol, Ukraine, Monday, March 7, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A man plays with a baby in a bomb shelter in Mariupol, Ukraine, Sunday, March 6, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise after shelling by Russian forces in Mariupol, Ukraine, Friday, March 4, 2022.(AP Photo/Evgeniy Maloletka, File) FILE - Marina Yatsko, left, runs behind her boyfriend Fedor carrying her 18 month-old son Kirill who was killed in shelling, as they arrive at a hospital in Mariupol, Ukraine, Friday, March 4, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise from an air defence base in the aftermath of an apparent Russian strike in Mariupol, Ukraine, Thursday, Feb. 24, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - The lifeless body of a girl killed during the shelling of a residential area lies on a medical cart at the city hospital of Mariupol, eastern Ukraine, Sunday, Feb. 27, 2022. (AP Photo/Evgeniy Maloletka) FILE - A metallurgical plant is seen on the outskirts of the city of Mariupol, Ukraine, Thursday, Feb. 24, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - A hospital window is cracked from shelling in Mariupol, Ukraine, Thursday, March 3, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Evgeniy Maloletka) FILE - An explosion is seen in an apartment building after Russian's army tank fires in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A local resident walks past a damaged vehicle marked with the letter Z, which has become a symbol of the Russian military, in an area that Russian-backed separatists claim to control in the Ukraine city of Mariupol, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - An armed serviceman of Donetsk People's Republic militia walks past a building damaged during fighting in Mariupol, on the territory which is now under the Government of the Donetsk People's Republic control, eastern in Mariupol, Ukraine, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - A building damaged during fighting is seen in Mariupol, Ukraine, on April 13, 2022. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Alexei Alexandrov, File) FILE - A view inside the Mariupol theater damaged during fighting in Mariupol, in territory under the government of the Donetsk People's Republic, eastern Ukraine, Monday, April 4, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Damage is seen on apartment buildings after shelling from fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Ukrainian emergency employees and volunteers carry an injured pregnant woman from a maternity hospital damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. The woman and her baby later died. (AP Photo/Evgeniy Maloletka, File) FILE - A man rides his bicycle past a body covered by a rug after fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Premature babies who were left behind by their parents lay in a bed in hospital number 3 in Mariupol, Ukraine, Tuesday, March 15, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Marianna Vishegirskaya stands outside a maternity hospital that was damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. (AP Photo/Mstyslav Chernov, File) FILE - People look at a burning apartment building in a yard after shelling in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A woman reacts as she stands with her daughter as she waits for her husband to evacuate from a burning apartment in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A Ukrainian serviceman guards his position in Mariupol, Ukraine, Saturday, March 12, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Mstyslav Chernov, File) FILE - A fire burns at an apartment building after it was hit by the shelling of a residential district in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Mstyslav Chernov, File) FILE - A man walks with harbor cranes in the background, at the trade port in Mariupol, Ukraine, Wednesday, Feb. 23, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - Serhiy Kralya, 41, looks at the camera after surgery at a hospital in Mariupol, eastern Ukraine on Friday, March 11, 2022. Kralya was injured during shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - Russian's army tanks move down a street on the outskirts of Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Dead bodies are placed into a mass grave on the outskirts of Mariupol, Ukraine, Wednesday, March 9, 2022 as people cannot bury their dead because of the heavy shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - A body lies covered by a tarp in the street in Mariupol, Ukraine, Monday, March 7, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A man plays with a baby in a bomb shelter in Mariupol, Ukraine, Sunday, March 6, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise after shelling by Russian forces in Mariupol, Ukraine, Friday, March 4, 2022.(AP Photo/Evgeniy Maloletka, File) FILE - Marina Yatsko, left, runs behind her boyfriend Fedor carrying her 18 month-old son Kirill who was killed in shelling, as they arrive at a hospital in Mariupol, Ukraine, Friday, March 4, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise from an air defence base in the aftermath of an apparent Russian strike in Mariupol, Ukraine, Thursday, Feb. 24, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - The lifeless body of a girl killed during the shelling of a residential area lies on a medical cart at the city hospital of Mariupol, eastern Ukraine, Sunday, Feb. 27, 2022. (AP Photo/Evgeniy Maloletka) FILE - A metallurgical plant is seen on the outskirts of the city of Mariupol, Ukraine, Thursday, Feb. 24, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - A hospital window is cracked from shelling in Mariupol, Ukraine, Thursday, March 3, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Evgeniy Maloletka) FILE - An explosion is seen in an apartment building after Russian's army tank fires in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A local resident walks past a damaged vehicle marked with the letter Z, which has become a symbol of the Russian military, in an area that Russian-backed separatists claim to control in the Ukraine city of Mariupol, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - An armed serviceman of Donetsk People's Republic militia walks past a building damaged during fighting in Mariupol, on the territory which is now under the Government of the Donetsk People's Republic control, eastern in Mariupol, Ukraine, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - A building damaged during fighting is seen in Mariupol, Ukraine, on April 13, 2022. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Alexei Alexandrov, File) FILE - A view inside the Mariupol theater damaged during fighting in Mariupol, in territory under the government of the Donetsk People's Republic, eastern Ukraine, Monday, April 4, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Damage is seen on apartment buildings after shelling from fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Ukrainian emergency employees and volunteers carry an injured pregnant woman from a maternity hospital damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. The woman and her baby later died. (AP Photo/Evgeniy Maloletka, File) FILE - A man rides his bicycle past a body covered by a rug after fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Premature babies who were left behind by their parents lay in a bed in hospital number 3 in Mariupol, Ukraine, Tuesday, March 15, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Marianna Vishegirskaya stands outside a maternity hospital that was damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. (AP Photo/Mstyslav Chernov, File) FILE - People look at a burning apartment building in a yard after shelling in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A woman reacts as she stands with her daughter as she waits for her husband to evacuate from a burning apartment in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A Ukrainian serviceman guards his position in Mariupol, Ukraine, Saturday, March 12, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Mstyslav Chernov, File) FILE - A fire burns at an apartment building after it was hit by the shelling of a residential district in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Mstyslav Chernov, File) FILE - A man walks with harbor cranes in the background, at the trade port in Mariupol, Ukraine, Wednesday, Feb. 23, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - Serhiy Kralya, 41, looks at the camera after surgery at a hospital in Mariupol, eastern Ukraine on Friday, March 11, 2022. Kralya was injured during shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - Russian's army tanks move down a street on the outskirts of Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Dead bodies are placed into a mass grave on the outskirts of Mariupol, Ukraine, Wednesday, March 9, 2022 as people cannot bury their dead because of the heavy shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - A body lies covered by a tarp in the street in Mariupol, Ukraine, Monday, March 7, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A man plays with a baby in a bomb shelter in Mariupol, Ukraine, Sunday, March 6, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise after shelling by Russian forces in Mariupol, Ukraine, Friday, March 4, 2022.(AP Photo/Evgeniy Maloletka, File) FILE - Marina Yatsko, left, runs behind her boyfriend Fedor carrying her 18 month-old son Kirill who was killed in shelling, as they arrive at a hospital in Mariupol, Ukraine, Friday, March 4, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise from an air defence base in the aftermath of an apparent Russian strike in Mariupol, Ukraine, Thursday, Feb. 24, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - The lifeless body of a girl killed during the shelling of a residential area lies on a medical cart at the city hospital of Mariupol, eastern Ukraine, Sunday, Feb. 27, 2022. (AP Photo/Evgeniy Maloletka) FILE - A metallurgical plant is seen on the outskirts of the city of Mariupol, Ukraine, Thursday, Feb. 24, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - A hospital window is cracked from shelling in Mariupol, Ukraine, Thursday, March 3, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Evgeniy Maloletka) FILE - An explosion is seen in an apartment building after Russian's army tank fires in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A local resident walks past a damaged vehicle marked with the letter Z, which has become a symbol of the Russian military, in an area that Russian-backed separatists claim to control in the Ukraine city of Mariupol, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - An armed serviceman of Donetsk People's Republic militia walks past a building damaged during fighting in Mariupol, on the territory which is now under the Government of the Donetsk People's Republic control, eastern in Mariupol, Ukraine, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - A building damaged during fighting is seen in Mariupol, Ukraine, on April 13, 2022. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Alexei Alexandrov, File) FILE - A view inside the Mariupol theater damaged during fighting in Mariupol, in territory under the government of the Donetsk People's Republic, eastern Ukraine, Monday, April 4, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Damage is seen on apartment buildings after shelling from fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Ukrainian emergency employees and volunteers carry an injured pregnant woman from a maternity hospital damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. The woman and her baby later died. (AP Photo/Evgeniy Maloletka, File) FILE - A man rides his bicycle past a body covered by a rug after fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Premature babies who were left behind by their parents lay in a bed in hospital number 3 in Mariupol, Ukraine, Tuesday, March 15, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Marianna Vishegirskaya stands outside a maternity hospital that was damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. (AP Photo/Mstyslav Chernov, File) FILE - People look at a burning apartment building in a yard after shelling in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A woman reacts as she stands with her daughter as she waits for her husband to evacuate from a burning apartment in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A Ukrainian serviceman guards his position in Mariupol, Ukraine, Saturday, March 12, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Mstyslav Chernov, File) FILE - A fire burns at an apartment building after it was hit by the shelling of a residential district in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Mstyslav Chernov, File) FILE - A man walks with harbor cranes in the background, at the trade port in Mariupol, Ukraine, Wednesday, Feb. 23, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - Serhiy Kralya, 41, looks at the camera after surgery at a hospital in Mariupol, eastern Ukraine on Friday, March 11, 2022. Kralya was injured during shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - Russian's army tanks move down a street on the outskirts of Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Dead bodies are placed into a mass grave on the outskirts of Mariupol, Ukraine, Wednesday, March 9, 2022 as people cannot bury their dead because of the heavy shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - A body lies covered by a tarp in the street in Mariupol, Ukraine, Monday, March 7, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A man plays with a baby in a bomb shelter in Mariupol, Ukraine, Sunday, March 6, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise after shelling by Russian forces in Mariupol, Ukraine, Friday, March 4, 2022.(AP Photo/Evgeniy Maloletka, File) FILE - Marina Yatsko, left, runs behind her boyfriend Fedor carrying her 18 month-old son Kirill who was killed in shelling, as they arrive at a hospital in Mariupol, Ukraine, Friday, March 4, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise from an air defence base in the aftermath of an apparent Russian strike in Mariupol, Ukraine, Thursday, Feb. 24, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - The lifeless body of a girl killed during the shelling of a residential area lies on a medical cart at the city hospital of Mariupol, eastern Ukraine, Sunday, Feb. 27, 2022. (AP Photo/Evgeniy Maloletka) FILE - A metallurgical plant is seen on the outskirts of the city of Mariupol, Ukraine, Thursday, Feb. 24, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - A hospital window is cracked from shelling in Mariupol, Ukraine, Thursday, March 3, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Evgeniy Maloletka) FILE - An explosion is seen in an apartment building after Russian's army tank fires in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A local resident walks past a damaged vehicle marked with the letter Z, which has become a symbol of the Russian military, in an area that Russian-backed separatists claim to control in the Ukraine city of Mariupol, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - An armed serviceman of Donetsk People's Republic militia walks past a building damaged during fighting in Mariupol, on the territory which is now under the Government of the Donetsk People's Republic control, eastern in Mariupol, Ukraine, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - A building damaged during fighting is seen in Mariupol, Ukraine, on April 13, 2022. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Alexei Alexandrov, File) FILE - A view inside the Mariupol theater damaged during fighting in Mariupol, in territory under the government of the Donetsk People's Republic, eastern Ukraine, Monday, April 4, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Damage is seen on apartment buildings after shelling from fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Ukrainian emergency employees and volunteers carry an injured pregnant woman from a maternity hospital damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. The woman and her baby later died. (AP Photo/Evgeniy Maloletka, File) FILE - A man rides his bicycle past a body covered by a rug after fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Premature babies who were left behind by their parents lay in a bed in hospital number 3 in Mariupol, Ukraine, Tuesday, March 15, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Marianna Vishegirskaya stands outside a maternity hospital that was damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. (AP Photo/Mstyslav Chernov, File) FILE - People look at a burning apartment building in a yard after shelling in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A woman reacts as she stands with her daughter as she waits for her husband to evacuate from a burning apartment in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A Ukrainian serviceman guards his position in Mariupol, Ukraine, Saturday, March 12, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Mstyslav Chernov, File) FILE - A fire burns at an apartment building after it was hit by the shelling of a residential district in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Mstyslav Chernov, File) FILE - A man walks with harbor cranes in the background, at the trade port in Mariupol, Ukraine, Wednesday, Feb. 23, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - Serhiy Kralya, 41, looks at the camera after surgery at a hospital in Mariupol, eastern Ukraine on Friday, March 11, 2022. Kralya was injured during shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - Russian's army tanks move down a street on the outskirts of Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Dead bodies are placed into a mass grave on the outskirts of Mariupol, Ukraine, Wednesday, March 9, 2022 as people cannot bury their dead because of the heavy shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - A body lies covered by a tarp in the street in Mariupol, Ukraine, Monday, March 7, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A man plays with a baby in a bomb shelter in Mariupol, Ukraine, Sunday, March 6, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise after shelling by Russian forces in Mariupol, Ukraine, Friday, March 4, 2022.(AP Photo/Evgeniy Maloletka, File) FILE - Marina Yatsko, left, runs behind her boyfriend Fedor carrying her 18 month-old son Kirill who was killed in shelling, as they arrive at a hospital in Mariupol, Ukraine, Friday, March 4, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise from an air defence base in the aftermath of an apparent Russian strike in Mariupol, Ukraine, Thursday, Feb. 24, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - The lifeless body of a girl killed during the shelling of a residential area lies on a medical cart at the city hospital of Mariupol, eastern Ukraine, Sunday, Feb. 27, 2022. (AP Photo/Evgeniy Maloletka) FILE - A metallurgical plant is seen on the outskirts of the city of Mariupol, Ukraine, Thursday, Feb. 24, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - A hospital window is cracked from shelling in Mariupol, Ukraine, Thursday, March 3, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Evgeniy Maloletka) FILE - An explosion is seen in an apartment building after Russian's army tank fires in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A local resident walks past a damaged vehicle marked with the letter Z, which has become a symbol of the Russian military, in an area that Russian-backed separatists claim to control in the Ukraine city of Mariupol, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - An armed serviceman of Donetsk People's Republic militia walks past a building damaged during fighting in Mariupol, on the territory which is now under the Government of the Donetsk People's Republic control, eastern in Mariupol, Ukraine, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - A building damaged during fighting is seen in Mariupol, Ukraine, on April 13, 2022. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Alexei Alexandrov, File) FILE - A view inside the Mariupol theater damaged during fighting in Mariupol, in territory under the government of the Donetsk People's Republic, eastern Ukraine, Monday, April 4, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Damage is seen on apartment buildings after shelling from fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Ukrainian emergency employees and volunteers carry an injured pregnant woman from a maternity hospital damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. The woman and her baby later died. (AP Photo/Evgeniy Maloletka, File) FILE - A man rides his bicycle past a body covered by a rug after fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Premature babies who were left behind by their parents lay in a bed in hospital number 3 in Mariupol, Ukraine, Tuesday, March 15, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Marianna Vishegirskaya stands outside a maternity hospital that was damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. (AP Photo/Mstyslav Chernov, File) FILE - People look at a burning apartment building in a yard after shelling in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A woman reacts as she stands with her daughter as she waits for her husband to evacuate from a burning apartment in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A Ukrainian serviceman guards his position in Mariupol, Ukraine, Saturday, March 12, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Mstyslav Chernov, File) FILE - A fire burns at an apartment building after it was hit by the shelling of a residential district in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Mstyslav Chernov, File) FILE - A man walks with harbor cranes in the background, at the trade port in Mariupol, Ukraine, Wednesday, Feb. 23, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - Serhiy Kralya, 41, looks at the camera after surgery at a hospital in Mariupol, eastern Ukraine on Friday, March 11, 2022. Kralya was injured during shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - Russian's army tanks move down a street on the outskirts of Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Dead bodies are placed into a mass grave on the outskirts of Mariupol, Ukraine, Wednesday, March 9, 2022 as people cannot bury their dead because of the heavy shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - A body lies covered by a tarp in the street in Mariupol, Ukraine, Monday, March 7, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A man plays with a baby in a bomb shelter in Mariupol, Ukraine, Sunday, March 6, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise after shelling by Russian forces in Mariupol, Ukraine, Friday, March 4, 2022.(AP Photo/Evgeniy Maloletka, File) FILE - Marina Yatsko, left, runs behind her boyfriend Fedor carrying her 18 month-old son Kirill who was killed in shelling, as they arrive at a hospital in Mariupol, Ukraine, Friday, March 4, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise from an air defence base in the aftermath of an apparent Russian strike in Mariupol, Ukraine, Thursday, Feb. 24, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Ambulance paramedics move an injured man on a stretcher, wounded by shelling in a residential area, at the maternity hospital converted into a medical ward and used as a bomb shelter in Mariupol, Ukraine, Tuesday, March 1, 2022. Russian strikes on the key southern port city of Mariupol seriously wounded several people. (AP Photo/Evgeniy Maloletka, File) FILE - The lifeless body of a girl killed during the shelling of a residential area lies on a medical cart at the city hospital of Mariupol, eastern Ukraine, Sunday, Feb. 27, 2022. (AP Photo/Evgeniy Maloletka) FILE - A metallurgical plant is seen on the outskirts of the city of Mariupol, Ukraine, Thursday, Feb. 24, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - A hospital window is cracked from shelling in Mariupol, Ukraine, Thursday, March 3, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Evgeniy Maloletka) FILE - An explosion is seen in an apartment building after Russian's army tank fires in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A local resident walks past a damaged vehicle marked with the letter Z, which has become a symbol of the Russian military, in an area that Russian-backed separatists claim to control in the Ukraine city of Mariupol, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - An armed serviceman of Donetsk People's Republic militia walks past a building damaged during fighting in Mariupol, on the territory which is now under the Government of the Donetsk People's Republic control, eastern in Mariupol, Ukraine, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - A building damaged during fighting is seen in Mariupol, Ukraine, on April 13, 2022. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Alexei Alexandrov, File) FILE - A view inside the Mariupol theater damaged during fighting in Mariupol, in territory under the government of the Donetsk People's Republic, eastern Ukraine, Monday, April 4, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Damage is seen on apartment buildings after shelling from fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Ukrainian emergency employees and volunteers carry an injured pregnant woman from a maternity hospital damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. The woman and her baby later died. (AP Photo/Evgeniy Maloletka, File) FILE - A man rides his bicycle past a body covered by a rug after fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Premature babies who were left behind by their parents lay in a bed in hospital number 3 in Mariupol, Ukraine, Tuesday, March 15, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Marianna Vishegirskaya stands outside a maternity hospital that was damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. (AP Photo/Mstyslav Chernov, File) FILE - People look at a burning apartment building in a yard after shelling in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A woman reacts as she stands with her daughter as she waits for her husband to evacuate from a burning apartment in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A Ukrainian serviceman guards his position in Mariupol, Ukraine, Saturday, March 12, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Mstyslav Chernov, File) FILE - A fire burns at an apartment building after it was hit by the shelling of a residential district in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Mstyslav Chernov, File) FILE - A man walks with harbor cranes in the background, at the trade port in Mariupol, Ukraine, Wednesday, Feb. 23, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - Serhiy Kralya, 41, looks at the camera after surgery at a hospital in Mariupol, eastern Ukraine on Friday, March 11, 2022. Kralya was injured during shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - Russian's army tanks move down a street on the outskirts of Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Dead bodies are placed into a mass grave on the outskirts of Mariupol, Ukraine, Wednesday, March 9, 2022 as people cannot bury their dead because of the heavy shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - A body lies covered by a tarp in the street in Mariupol, Ukraine, Monday, March 7, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A man plays with a baby in a bomb shelter in Mariupol, Ukraine, Sunday, March 6, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise after shelling by Russian forces in Mariupol, Ukraine, Friday, March 4, 2022.(AP Photo/Evgeniy Maloletka, File) FILE - Marina Yatsko, left, runs behind her boyfriend Fedor carrying her 18 month-old son Kirill who was killed in shelling, as they arrive at a hospital in Mariupol, Ukraine, Friday, March 4, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise from an air defence base in the aftermath of an apparent Russian strike in Mariupol, Ukraine, Thursday, Feb. 24, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - The lifeless body of a girl killed during the shelling of a residential area lies on a medical cart at the city hospital of Mariupol, eastern Ukraine, Sunday, Feb. 27, 2022. (AP Photo/Evgeniy Maloletka) FILE - A metallurgical plant is seen on the outskirts of the city of Mariupol, Ukraine, Thursday, Feb. 24, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - A hospital window is cracked from shelling in Mariupol, Ukraine, Thursday, March 3, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Evgeniy Maloletka) FILE - An explosion is seen in an apartment building after Russian's army tank fires in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A local resident walks past a damaged vehicle marked with the letter Z, which has become a symbol of the Russian military, in an area that Russian-backed separatists claim to control in the Ukraine city of Mariupol, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - An armed serviceman of Donetsk People's Republic militia walks past a building damaged during fighting in Mariupol, on the territory which is now under the Government of the Donetsk People's Republic control, eastern in Mariupol, Ukraine, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - A building damaged during fighting is seen in Mariupol, Ukraine, on April 13, 2022. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Alexei Alexandrov, File) FILE - A view inside the Mariupol theater damaged during fighting in Mariupol, in territory under the government of the Donetsk People's Republic, eastern Ukraine, Monday, April 4, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Damage is seen on apartment buildings after shelling from fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Ukrainian emergency employees and volunteers carry an injured pregnant woman from a maternity hospital damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. The woman and her baby later died. (AP Photo/Evgeniy Maloletka, File) FILE - A man rides his bicycle past a body covered by a rug after fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Premature babies who were left behind by their parents lay in a bed in hospital number 3 in Mariupol, Ukraine, Tuesday, March 15, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Marianna Vishegirskaya stands outside a maternity hospital that was damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. (AP Photo/Mstyslav Chernov, File) FILE - People look at a burning apartment building in a yard after shelling in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A woman reacts as she stands with her daughter as she waits for her husband to evacuate from a burning apartment in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A Ukrainian serviceman guards his position in Mariupol, Ukraine, Saturday, March 12, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Mstyslav Chernov, File) FILE - A fire burns at an apartment building after it was hit by the shelling of a residential district in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Mstyslav Chernov, File) FILE - A man walks with harbor cranes in the background, at the trade port in Mariupol, Ukraine, Wednesday, Feb. 23, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - Serhiy Kralya, 41, looks at the camera after surgery at a hospital in Mariupol, eastern Ukraine on Friday, March 11, 2022. Kralya was injured during shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - Russian's army tanks move down a street on the outskirts of Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Dead bodies are placed into a mass grave on the outskirts of Mariupol, Ukraine, Wednesday, March 9, 2022 as people cannot bury their dead because of the heavy shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - A body lies covered by a tarp in the street in Mariupol, Ukraine, Monday, March 7, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A man plays with a baby in a bomb shelter in Mariupol, Ukraine, Sunday, March 6, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise after shelling by Russian forces in Mariupol, Ukraine, Friday, March 4, 2022.(AP Photo/Evgeniy Maloletka, File) FILE - Marina Yatsko, left, runs behind her boyfriend Fedor carrying her 18 month-old son Kirill who was killed in shelling, as they arrive at a hospital in Mariupol, Ukraine, Friday, March 4, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise from an air defence base in the aftermath of an apparent Russian strike in Mariupol, Ukraine, Thursday, Feb. 24, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - The lifeless body of a girl killed during the shelling of a residential area lies on a medical cart at the city hospital of Mariupol, eastern Ukraine, Sunday, Feb. 27, 2022. (AP Photo/Evgeniy Maloletka) FILE - A metallurgical plant is seen on the outskirts of the city of Mariupol, Ukraine, Thursday, Feb. 24, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - A hospital window is cracked from shelling in Mariupol, Ukraine, Thursday, March 3, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Evgeniy Maloletka) FILE - An explosion is seen in an apartment building after Russian's army tank fires in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A local resident walks past a damaged vehicle marked with the letter Z, which has become a symbol of the Russian military, in an area that Russian-backed separatists claim to control in the Ukraine city of Mariupol, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - An armed serviceman of Donetsk People's Republic militia walks past a building damaged during fighting in Mariupol, on the territory which is now under the Government of the Donetsk People's Republic control, eastern in Mariupol, Ukraine, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - A building damaged during fighting is seen in Mariupol, Ukraine, on April 13, 2022. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Alexei Alexandrov, File) FILE - A view inside the Mariupol theater damaged during fighting in Mariupol, in territory under the government of the Donetsk People's Republic, eastern Ukraine, Monday, April 4, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Damage is seen on apartment buildings after shelling from fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Ukrainian emergency employees and volunteers carry an injured pregnant woman from a maternity hospital damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. The woman and her baby later died. (AP Photo/Evgeniy Maloletka, File) FILE - A man rides his bicycle past a body covered by a rug after fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Premature babies who were left behind by their parents lay in a bed in hospital number 3 in Mariupol, Ukraine, Tuesday, March 15, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Marianna Vishegirskaya stands outside a maternity hospital that was damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. (AP Photo/Mstyslav Chernov, File) FILE - People look at a burning apartment building in a yard after shelling in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A woman reacts as she stands with her daughter as she waits for her husband to evacuate from a burning apartment in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A Ukrainian serviceman guards his position in Mariupol, Ukraine, Saturday, March 12, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Mstyslav Chernov, File) FILE - A fire burns at an apartment building after it was hit by the shelling of a residential district in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Mstyslav Chernov, File) FILE - A man walks with harbor cranes in the background, at the trade port in Mariupol, Ukraine, Wednesday, Feb. 23, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - Serhiy Kralya, 41, looks at the camera after surgery at a hospital in Mariupol, eastern Ukraine on Friday, March 11, 2022. Kralya was injured during shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - Russian's army tanks move down a street on the outskirts of Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Dead bodies are placed into a mass grave on the outskirts of Mariupol, Ukraine, Wednesday, March 9, 2022 as people cannot bury their dead because of the heavy shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - A body lies covered by a tarp in the street in Mariupol, Ukraine, Monday, March 7, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A man plays with a baby in a bomb shelter in Mariupol, Ukraine, Sunday, March 6, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise after shelling by Russian forces in Mariupol, Ukraine, Friday, March 4, 2022.(AP Photo/Evgeniy Maloletka, File) FILE - Marina Yatsko, left, runs behind her boyfriend Fedor carrying her 18 month-old son Kirill who was killed in shelling, as they arrive at a hospital in Mariupol, Ukraine, Friday, March 4, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise from an air defence base in the aftermath of an apparent Russian strike in Mariupol, Ukraine, Thursday, Feb. 24, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - The lifeless body of a girl killed during the shelling of a residential area lies on a medical cart at the city hospital of Mariupol, eastern Ukraine, Sunday, Feb. 27, 2022. (AP Photo/Evgeniy Maloletka) FILE - A metallurgical plant is seen on the outskirts of the city of Mariupol, Ukraine, Thursday, Feb. 24, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - A hospital window is cracked from shelling in Mariupol, Ukraine, Thursday, March 3, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Evgeniy Maloletka) FILE - An explosion is seen in an apartment building after Russian's army tank fires in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A local resident walks past a damaged vehicle marked with the letter Z, which has become a symbol of the Russian military, in an area that Russian-backed separatists claim to control in the Ukraine city of Mariupol, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - An armed serviceman of Donetsk People's Republic militia walks past a building damaged during fighting in Mariupol, on the territory which is now under the Government of the Donetsk People's Republic control, eastern in Mariupol, Ukraine, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - A building damaged during fighting is seen in Mariupol, Ukraine, on April 13, 2022. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Alexei Alexandrov, File) FILE - A view inside the Mariupol theater damaged during fighting in Mariupol, in territory under the government of the Donetsk People's Republic, eastern Ukraine, Monday, April 4, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Damage is seen on apartment buildings after shelling from fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Ukrainian emergency employees and volunteers carry an injured pregnant woman from a maternity hospital damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. The woman and her baby later died. (AP Photo/Evgeniy Maloletka, File) FILE - A man rides his bicycle past a body covered by a rug after fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Premature babies who were left behind by their parents lay in a bed in hospital number 3 in Mariupol, Ukraine, Tuesday, March 15, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Marianna Vishegirskaya stands outside a maternity hospital that was damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. (AP Photo/Mstyslav Chernov, File) FILE - People look at a burning apartment building in a yard after shelling in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A woman reacts as she stands with her daughter as she waits for her husband to evacuate from a burning apartment in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A Ukrainian serviceman guards his position in Mariupol, Ukraine, Saturday, March 12, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Mstyslav Chernov, File) FILE - A fire burns at an apartment building after it was hit by the shelling of a residential district in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Mstyslav Chernov, File) FILE - A man walks with harbor cranes in the background, at the trade port in Mariupol, Ukraine, Wednesday, Feb. 23, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - Serhiy Kralya, 41, looks at the camera after surgery at a hospital in Mariupol, eastern Ukraine on Friday, March 11, 2022. Kralya was injured during shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - Russian's army tanks move down a street on the outskirts of Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Dead bodies are placed into a mass grave on the outskirts of Mariupol, Ukraine, Wednesday, March 9, 2022 as people cannot bury their dead because of the heavy shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - A body lies covered by a tarp in the street in Mariupol, Ukraine, Monday, March 7, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A man plays with a baby in a bomb shelter in Mariupol, Ukraine, Sunday, March 6, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise after shelling by Russian forces in Mariupol, Ukraine, Friday, March 4, 2022.(AP Photo/Evgeniy Maloletka, File) FILE - Marina Yatsko, left, runs behind her boyfriend Fedor carrying her 18 month-old son Kirill who was killed in shelling, as they arrive at a hospital in Mariupol, Ukraine, Friday, March 4, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise from an air defence base in the aftermath of an apparent Russian strike in Mariupol, Ukraine, Thursday, Feb. 24, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - The lifeless body of a girl killed during the shelling of a residential area lies on a medical cart at the city hospital of Mariupol, eastern Ukraine, Sunday, Feb. 27, 2022. (AP Photo/Evgeniy Maloletka) FILE - A metallurgical plant is seen on the outskirts of the city of Mariupol, Ukraine, Thursday, Feb. 24, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - A hospital window is cracked from shelling in Mariupol, Ukraine, Thursday, March 3, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Evgeniy Maloletka) FILE - An explosion is seen in an apartment building after Russian's army tank fires in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A local resident walks past a damaged vehicle marked with the letter Z, which has become a symbol of the Russian military, in an area that Russian-backed separatists claim to control in the Ukraine city of Mariupol, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - An armed serviceman of Donetsk People's Republic militia walks past a building damaged during fighting in Mariupol, on the territory which is now under the Government of the Donetsk People's Republic control, eastern in Mariupol, Ukraine, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - A building damaged during fighting is seen in Mariupol, Ukraine, on April 13, 2022. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Alexei Alexandrov, File) FILE - A view inside the Mariupol theater damaged during fighting in Mariupol, in territory under the government of the Donetsk People's Republic, eastern Ukraine, Monday, April 4, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Damage is seen on apartment buildings after shelling from fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Ukrainian emergency employees and volunteers carry an injured pregnant woman from a maternity hospital damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. The woman and her baby later died. (AP Photo/Evgeniy Maloletka, File) FILE - A man rides his bicycle past a body covered by a rug after fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Premature babies who were left behind by their parents lay in a bed in hospital number 3 in Mariupol, Ukraine, Tuesday, March 15, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Marianna Vishegirskaya stands outside a maternity hospital that was damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. (AP Photo/Mstyslav Chernov, File) FILE - People look at a burning apartment building in a yard after shelling in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A woman reacts as she stands with her daughter as she waits for her husband to evacuate from a burning apartment in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A Ukrainian serviceman guards his position in Mariupol, Ukraine, Saturday, March 12, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Mstyslav Chernov, File) FILE - A fire burns at an apartment building after it was hit by the shelling of a residential district in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Mstyslav Chernov, File) FILE - A man walks with harbor cranes in the background, at the trade port in Mariupol, Ukraine, Wednesday, Feb. 23, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - Serhiy Kralya, 41, looks at the camera after surgery at a hospital in Mariupol, eastern Ukraine on Friday, March 11, 2022. Kralya was injured during shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - Russian's army tanks move down a street on the outskirts of Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Dead bodies are placed into a mass grave on the outskirts of Mariupol, Ukraine, Wednesday, March 9, 2022 as people cannot bury their dead because of the heavy shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - A body lies covered by a tarp in the street in Mariupol, Ukraine, Monday, March 7, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A man plays with a baby in a bomb shelter in Mariupol, Ukraine, Sunday, March 6, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise after shelling by Russian forces in Mariupol, Ukraine, Friday, March 4, 2022.(AP Photo/Evgeniy Maloletka, File) FILE - Marina Yatsko, left, runs behind her boyfriend Fedor carrying her 18 month-old son Kirill who was killed in shelling, as they arrive at a hospital in Mariupol, Ukraine, Friday, March 4, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise from an air defence base in the aftermath of an apparent Russian strike in Mariupol, Ukraine, Thursday, Feb. 24, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - The lifeless body of a girl killed during the shelling of a residential area lies on a medical cart at the city hospital of Mariupol, eastern Ukraine, Sunday, Feb. 27, 2022. (AP Photo/Evgeniy Maloletka) FILE - A metallurgical plant is seen on the outskirts of the city of Mariupol, Ukraine, Thursday, Feb. 24, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - A hospital window is cracked from shelling in Mariupol, Ukraine, Thursday, March 3, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Evgeniy Maloletka) FILE - An explosion is seen in an apartment building after Russian's army tank fires in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A local resident walks past a damaged vehicle marked with the letter Z, which has become a symbol of the Russian military, in an area that Russian-backed separatists claim to control in the Ukraine city of Mariupol, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - An armed serviceman of Donetsk People's Republic militia walks past a building damaged during fighting in Mariupol, on the territory which is now under the Government of the Donetsk People's Republic control, eastern in Mariupol, Ukraine, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - A building damaged during fighting is seen in Mariupol, Ukraine, on April 13, 2022. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Alexei Alexandrov, File) FILE - A view inside the Mariupol theater damaged during fighting in Mariupol, in territory under the government of the Donetsk People's Republic, eastern Ukraine, Monday, April 4, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Damage is seen on apartment buildings after shelling from fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Ukrainian emergency employees and volunteers carry an injured pregnant woman from a maternity hospital damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. The woman and her baby later died. (AP Photo/Evgeniy Maloletka, File) FILE - A man rides his bicycle past a body covered by a rug after fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Premature babies who were left behind by their parents lay in a bed in hospital number 3 in Mariupol, Ukraine, Tuesday, March 15, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Marianna Vishegirskaya stands outside a maternity hospital that was damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. (AP Photo/Mstyslav Chernov, File) FILE - People look at a burning apartment building in a yard after shelling in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A woman reacts as she stands with her daughter as she waits for her husband to evacuate from a burning apartment in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A Ukrainian serviceman guards his position in Mariupol, Ukraine, Saturday, March 12, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Mstyslav Chernov, File) FILE - A fire burns at an apartment building after it was hit by the shelling of a residential district in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Mstyslav Chernov, File) FILE - A man walks with harbor cranes in the background, at the trade port in Mariupol, Ukraine, Wednesday, Feb. 23, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - Serhiy Kralya, 41, looks at the camera after surgery at a hospital in Mariupol, eastern Ukraine on Friday, March 11, 2022. Kralya was injured during shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - Russian's army tanks move down a street on the outskirts of Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Dead bodies are placed into a mass grave on the outskirts of Mariupol, Ukraine, Wednesday, March 9, 2022 as people cannot bury their dead because of the heavy shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - A body lies covered by a tarp in the street in Mariupol, Ukraine, Monday, March 7, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A man plays with a baby in a bomb shelter in Mariupol, Ukraine, Sunday, March 6, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise after shelling by Russian forces in Mariupol, Ukraine, Friday, March 4, 2022.(AP Photo/Evgeniy Maloletka, File) FILE - Marina Yatsko, left, runs behind her boyfriend Fedor carrying her 18 month-old son Kirill who was killed in shelling, as they arrive at a hospital in Mariupol, Ukraine, Friday, March 4, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise from an air defence base in the aftermath of an apparent Russian strike in Mariupol, Ukraine, Thursday, Feb. 24, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - The lifeless body of a girl killed during the shelling of a residential area lies on a medical cart at the city hospital of Mariupol, eastern Ukraine, Sunday, Feb. 27, 2022. (AP Photo/Evgeniy Maloletka) FILE - A metallurgical plant is seen on the outskirts of the city of Mariupol, Ukraine, Thursday, Feb. 24, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - A hospital window is cracked from shelling in Mariupol, Ukraine, Thursday, March 3, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Evgeniy Maloletka) FILE - An explosion is seen in an apartment building after Russian's army tank fires in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A local resident walks past a damaged vehicle marked with the letter Z, which has become a symbol of the Russian military, in an area that Russian-backed separatists claim to control in the Ukraine city of Mariupol, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - An armed serviceman of Donetsk People's Republic militia walks past a building damaged during fighting in Mariupol, on the territory which is now under the Government of the Donetsk People's Republic control, eastern in Mariupol, Ukraine, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - A building damaged during fighting is seen in Mariupol, Ukraine, on April 13, 2022. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Alexei Alexandrov, File) FILE - A view inside the Mariupol theater damaged during fighting in Mariupol, in territory under the government of the Donetsk People's Republic, eastern Ukraine, Monday, April 4, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Damage is seen on apartment buildings after shelling from fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Ukrainian emergency employees and volunteers carry an injured pregnant woman from a maternity hospital damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. The woman and her baby later died. (AP Photo/Evgeniy Maloletka, File) FILE - A man rides his bicycle past a body covered by a rug after fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Premature babies who were left behind by their parents lay in a bed in hospital number 3 in Mariupol, Ukraine, Tuesday, March 15, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Marianna Vishegirskaya stands outside a maternity hospital that was damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. (AP Photo/Mstyslav Chernov, File) FILE - People look at a burning apartment building in a yard after shelling in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A woman reacts as she stands with her daughter as she waits for her husband to evacuate from a burning apartment in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A Ukrainian serviceman guards his position in Mariupol, Ukraine, Saturday, March 12, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Mstyslav Chernov, File) FILE - A fire burns at an apartment building after it was hit by the shelling of a residential district in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Mstyslav Chernov, File) FILE - A man walks with harbor cranes in the background, at the trade port in Mariupol, Ukraine, Wednesday, Feb. 23, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - Serhiy Kralya, 41, looks at the camera after surgery at a hospital in Mariupol, eastern Ukraine on Friday, March 11, 2022. Kralya was injured during shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - Russian's army tanks move down a street on the outskirts of Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Dead bodies are placed into a mass grave on the outskirts of Mariupol, Ukraine, Wednesday, March 9, 2022 as people cannot bury their dead because of the heavy shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - A body lies covered by a tarp in the street in Mariupol, Ukraine, Monday, March 7, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A man plays with a baby in a bomb shelter in Mariupol, Ukraine, Sunday, March 6, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise after shelling by Russian forces in Mariupol, Ukraine, Friday, March 4, 2022.(AP Photo/Evgeniy Maloletka, File) FILE - Marina Yatsko, left, runs behind her boyfriend Fedor carrying her 18 month-old son Kirill who was killed in shelling, as they arrive at a hospital in Mariupol, Ukraine, Friday, March 4, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise from an air defence base in the aftermath of an apparent Russian strike in Mariupol, Ukraine, Thursday, Feb. 24, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - The lifeless body of a girl killed during the shelling of a residential area lies on a medical cart at the city hospital of Mariupol, eastern Ukraine, Sunday, Feb. 27, 2022. (AP Photo/Evgeniy Maloletka) FILE - A metallurgical plant is seen on the outskirts of the city of Mariupol, Ukraine, Thursday, Feb. 24, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - A hospital window is cracked from shelling in Mariupol, Ukraine, Thursday, March 3, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Evgeniy Maloletka) FILE - An explosion is seen in an apartment building after Russian's army tank fires in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A local resident walks past a damaged vehicle marked with the letter Z, which has become a symbol of the Russian military, in an area that Russian-backed separatists claim to control in the Ukraine city of Mariupol, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - An armed serviceman of Donetsk People's Republic militia walks past a building damaged during fighting in Mariupol, on the territory which is now under the Government of the Donetsk People's Republic control, eastern in Mariupol, Ukraine, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - A building damaged during fighting is seen in Mariupol, Ukraine, on April 13, 2022. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Alexei Alexandrov, File) FILE - A view inside the Mariupol theater damaged during fighting in Mariupol, in territory under the government of the Donetsk People's Republic, eastern Ukraine, Monday, April 4, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Damage is seen on apartment buildings after shelling from fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Ukrainian emergency employees and volunteers carry an injured pregnant woman from a maternity hospital damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. The woman and her baby later died. (AP Photo/Evgeniy Maloletka, File) FILE - A man rides his bicycle past a body covered by a rug after fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Premature babies who were left behind by their parents lay in a bed in hospital number 3 in Mariupol, Ukraine, Tuesday, March 15, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Marianna Vishegirskaya stands outside a maternity hospital that was damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. (AP Photo/Mstyslav Chernov, File) FILE - People look at a burning apartment building in a yard after shelling in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A woman reacts as she stands with her daughter as she waits for her husband to evacuate from a burning apartment in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A Ukrainian serviceman guards his position in Mariupol, Ukraine, Saturday, March 12, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Mstyslav Chernov, File) FILE - A fire burns at an apartment building after it was hit by the shelling of a residential district in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Mstyslav Chernov, File) FILE - A man walks with harbor cranes in the background, at the trade port in Mariupol, Ukraine, Wednesday, Feb. 23, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - Serhiy Kralya, 41, looks at the camera after surgery at a hospital in Mariupol, eastern Ukraine on Friday, March 11, 2022. Kralya was injured during shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - Russian's army tanks move down a street on the outskirts of Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Dead bodies are placed into a mass grave on the outskirts of Mariupol, Ukraine, Wednesday, March 9, 2022 as people cannot bury their dead because of the heavy shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - A body lies covered by a tarp in the street in Mariupol, Ukraine, Monday, March 7, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A man plays with a baby in a bomb shelter in Mariupol, Ukraine, Sunday, March 6, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise after shelling by Russian forces in Mariupol, Ukraine, Friday, March 4, 2022.(AP Photo/Evgeniy Maloletka, File) FILE - Marina Yatsko, left, runs behind her boyfriend Fedor carrying her 18 month-old son Kirill who was killed in shelling, as they arrive at a hospital in Mariupol, Ukraine, Friday, March 4, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise from an air defence base in the aftermath of an apparent Russian strike in Mariupol, Ukraine, Thursday, Feb. 24, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - The lifeless body of a girl killed during the shelling of a residential area lies on a medical cart at the city hospital of Mariupol, eastern Ukraine, Sunday, Feb. 27, 2022. (AP Photo/Evgeniy Maloletka) FILE - A metallurgical plant is seen on the outskirts of the city of Mariupol, Ukraine, Thursday, Feb. 24, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - A hospital window is cracked from shelling in Mariupol, Ukraine, Thursday, March 3, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Evgeniy Maloletka) FILE - An explosion is seen in an apartment building after Russian's army tank fires in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A local resident walks past a damaged vehicle marked with the letter Z, which has become a symbol of the Russian military, in an area that Russian-backed separatists claim to control in the Ukraine city of Mariupol, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - An armed serviceman of Donetsk People's Republic militia walks past a building damaged during fighting in Mariupol, on the territory which is now under the Government of the Donetsk People's Republic control, eastern in Mariupol, Ukraine, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - A building damaged during fighting is seen in Mariupol, Ukraine, on April 13, 2022. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Alexei Alexandrov, File) FILE - A view inside the Mariupol theater damaged during fighting in Mariupol, in territory under the government of the Donetsk People's Republic, eastern Ukraine, Monday, April 4, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Damage is seen on apartment buildings after shelling from fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Ukrainian emergency employees and volunteers carry an injured pregnant woman from a maternity hospital damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. The woman and her baby later died. (AP Photo/Evgeniy Maloletka, File) FILE - A man rides his bicycle past a body covered by a rug after fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Premature babies who were left behind by their parents lay in a bed in hospital number 3 in Mariupol, Ukraine, Tuesday, March 15, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Marianna Vishegirskaya stands outside a maternity hospital that was damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. (AP Photo/Mstyslav Chernov, File) FILE - People look at a burning apartment building in a yard after shelling in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A woman reacts as she stands with her daughter as she waits for her husband to evacuate from a burning apartment in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A Ukrainian serviceman guards his position in Mariupol, Ukraine, Saturday, March 12, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Mstyslav Chernov, File) FILE - A fire burns at an apartment building after it was hit by the shelling of a residential district in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Mstyslav Chernov, File) FILE - A man walks with harbor cranes in the background, at the trade port in Mariupol, Ukraine, Wednesday, Feb. 23, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - Serhiy Kralya, 41, looks at the camera after surgery at a hospital in Mariupol, eastern Ukraine on Friday, March 11, 2022. Kralya was injured during shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - Russian's army tanks move down a street on the outskirts of Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Dead bodies are placed into a mass grave on the outskirts of Mariupol, Ukraine, Wednesday, March 9, 2022 as people cannot bury their dead because of the heavy shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - A body lies covered by a tarp in the street in Mariupol, Ukraine, Monday, March 7, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A man plays with a baby in a bomb shelter in Mariupol, Ukraine, Sunday, March 6, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise after shelling by Russian forces in Mariupol, Ukraine, Friday, March 4, 2022.(AP Photo/Evgeniy Maloletka, File) FILE - Marina Yatsko, left, runs behind her boyfriend Fedor carrying her 18 month-old son Kirill who was killed in shelling, as they arrive at a hospital in Mariupol, Ukraine, Friday, March 4, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise from an air defence base in the aftermath of an apparent Russian strike in Mariupol, Ukraine, Thursday, Feb. 24, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - The lifeless body of a girl killed during the shelling of a residential area lies on a medical cart at the city hospital of Mariupol, eastern Ukraine, Sunday, Feb. 27, 2022. (AP Photo/Evgeniy Maloletka) FILE - A metallurgical plant is seen on the outskirts of the city of Mariupol, Ukraine, Thursday, Feb. 24, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - A hospital window is cracked from shelling in Mariupol, Ukraine, Thursday, March 3, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Evgeniy Maloletka) FILE - An explosion is seen in an apartment building after Russian's army tank fires in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A local resident walks past a damaged vehicle marked with the letter Z, which has become a symbol of the Russian military, in an area that Russian-backed separatists claim to control in the Ukraine city of Mariupol, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - An armed serviceman of Donetsk People's Republic militia walks past a building damaged during fighting in Mariupol, on the territory which is now under the Government of the Donetsk People's Republic control, eastern in Mariupol, Ukraine, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - A building damaged during fighting is seen in Mariupol, Ukraine, on April 13, 2022. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Alexei Alexandrov, File) FILE - A view inside the Mariupol theater damaged during fighting in Mariupol, in territory under the government of the Donetsk People's Republic, eastern Ukraine, Monday, April 4, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Damage is seen on apartment buildings after shelling from fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Ukrainian emergency employees and volunteers carry an injured pregnant woman from a maternity hospital damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. The woman and her baby later died. (AP Photo/Evgeniy Maloletka, File) FILE - A man rides his bicycle past a body covered by a rug after fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Premature babies who were left behind by their parents lay in a bed in hospital number 3 in Mariupol, Ukraine, Tuesday, March 15, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Marianna Vishegirskaya stands outside a maternity hospital that was damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. (AP Photo/Mstyslav Chernov, File) FILE - People look at a burning apartment building in a yard after shelling in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A woman reacts as she stands with her daughter as she waits for her husband to evacuate from a burning apartment in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A Ukrainian serviceman guards his position in Mariupol, Ukraine, Saturday, March 12, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Mstyslav Chernov, File) FILE - A fire burns at an apartment building after it was hit by the shelling of a residential district in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Mstyslav Chernov, File) FILE - A man walks with harbor cranes in the background, at the trade port in Mariupol, Ukraine, Wednesday, Feb. 23, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - Serhiy Kralya, 41, looks at the camera after surgery at a hospital in Mariupol, eastern Ukraine on Friday, March 11, 2022. Kralya was injured during shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - Russian's army tanks move down a street on the outskirts of Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Dead bodies are placed into a mass grave on the outskirts of Mariupol, Ukraine, Wednesday, March 9, 2022 as people cannot bury their dead because of the heavy shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - A body lies covered by a tarp in the street in Mariupol, Ukraine, Monday, March 7, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A man plays with a baby in a bomb shelter in Mariupol, Ukraine, Sunday, March 6, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise after shelling by Russian forces in Mariupol, Ukraine, Friday, March 4, 2022.(AP Photo/Evgeniy Maloletka, File) FILE - Marina Yatsko, left, runs behind her boyfriend Fedor carrying her 18 month-old son Kirill who was killed in shelling, as they arrive at a hospital in Mariupol, Ukraine, Friday, March 4, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise from an air defence base in the aftermath of an apparent Russian strike in Mariupol, Ukraine, Thursday, Feb. 24, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - The lifeless body of a girl killed during the shelling of a residential area lies on a medical cart at the city hospital of Mariupol, eastern Ukraine, Sunday, Feb. 27, 2022. (AP Photo/Evgeniy Maloletka) FILE - A metallurgical plant is seen on the outskirts of the city of Mariupol, Ukraine, Thursday, Feb. 24, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - A hospital window is cracked from shelling in Mariupol, Ukraine, Thursday, March 3, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Evgeniy Maloletka) FILE - An explosion is seen in an apartment building after Russian's army tank fires in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A local resident walks past a damaged vehicle marked with the letter Z, which has become a symbol of the Russian military, in an area that Russian-backed separatists claim to control in the Ukraine city of Mariupol, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - An armed serviceman of Donetsk People's Republic militia walks past a building damaged during fighting in Mariupol, on the territory which is now under the Government of the Donetsk People's Republic control, eastern in Mariupol, Ukraine, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - A building damaged during fighting is seen in Mariupol, Ukraine, on April 13, 2022. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Alexei Alexandrov, File) FILE - A view inside the Mariupol theater damaged during fighting in Mariupol, in territory under the government of the Donetsk People's Republic, eastern Ukraine, Monday, April 4, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Damage is seen on apartment buildings after shelling from fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Ukrainian emergency employees and volunteers carry an injured pregnant woman from a maternity hospital damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. The woman and her baby later died. (AP Photo/Evgeniy Maloletka, File) FILE - A man rides his bicycle past a body covered by a rug after fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Premature babies who were left behind by their parents lay in a bed in hospital number 3 in Mariupol, Ukraine, Tuesday, March 15, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Marianna Vishegirskaya stands outside a maternity hospital that was damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. (AP Photo/Mstyslav Chernov, File) FILE - People look at a burning apartment building in a yard after shelling in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A woman reacts as she stands with her daughter as she waits for her husband to evacuate from a burning apartment in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A Ukrainian serviceman guards his position in Mariupol, Ukraine, Saturday, March 12, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Mstyslav Chernov, File) FILE - A fire burns at an apartment building after it was hit by the shelling of a residential district in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Mstyslav Chernov, File) FILE - A man walks with harbor cranes in the background, at the trade port in Mariupol, Ukraine, Wednesday, Feb. 23, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - Serhiy Kralya, 41, looks at the camera after surgery at a hospital in Mariupol, eastern Ukraine on Friday, March 11, 2022. Kralya was injured during shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - Russian's army tanks move down a street on the outskirts of Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Dead bodies are placed into a mass grave on the outskirts of Mariupol, Ukraine, Wednesday, March 9, 2022 as people cannot bury their dead because of the heavy shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - A body lies covered by a tarp in the street in Mariupol, Ukraine, Monday, March 7, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A man plays with a baby in a bomb shelter in Mariupol, Ukraine, Sunday, March 6, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise after shelling by Russian forces in Mariupol, Ukraine, Friday, March 4, 2022.(AP Photo/Evgeniy Maloletka, File) FILE - Marina Yatsko, left, runs behind her boyfriend Fedor carrying her 18 month-old son Kirill who was killed in shelling, as they arrive at a hospital in Mariupol, Ukraine, Friday, March 4, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise from an air defence base in the aftermath of an apparent Russian strike in Mariupol, Ukraine, Thursday, Feb. 24, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - The lifeless body of a girl killed during the shelling of a residential area lies on a medical cart at the city hospital of Mariupol, eastern Ukraine, Sunday, Feb. 27, 2022. (AP Photo/Evgeniy Maloletka) FILE - A metallurgical plant is seen on the outskirts of the city of Mariupol, Ukraine, Thursday, Feb. 24, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - A hospital window is cracked from shelling in Mariupol, Ukraine, Thursday, March 3, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Evgeniy Maloletka) FILE - An explosion is seen in an apartment building after Russian's army tank fires in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A local resident walks past a damaged vehicle marked with the letter Z, which has become a symbol of the Russian military, in an area that Russian-backed separatists claim to control in the Ukraine city of Mariupol, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - An armed serviceman of Donetsk People's Republic militia walks past a building damaged during fighting in Mariupol, on the territory which is now under the Government of the Donetsk People's Republic control, eastern in Mariupol, Ukraine, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - A building damaged during fighting is seen in Mariupol, Ukraine, on April 13, 2022. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Alexei Alexandrov, File) FILE - A view inside the Mariupol theater damaged during fighting in Mariupol, in territory under the government of the Donetsk People's Republic, eastern Ukraine, Monday, April 4, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Damage is seen on apartment buildings after shelling from fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Ukrainian emergency employees and volunteers carry an injured pregnant woman from a maternity hospital damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. The woman and her baby later died. (AP Photo/Evgeniy Maloletka, File) FILE - A man rides his bicycle past a body covered by a rug after fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Premature babies who were left behind by their parents lay in a bed in hospital number 3 in Mariupol, Ukraine, Tuesday, March 15, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Marianna Vishegirskaya stands outside a maternity hospital that was damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. (AP Photo/Mstyslav Chernov, File) FILE - People look at a burning apartment building in a yard after shelling in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A woman reacts as she stands with her daughter as she waits for her husband to evacuate from a burning apartment in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A Ukrainian serviceman guards his position in Mariupol, Ukraine, Saturday, March 12, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Mstyslav Chernov, File) FILE - A fire burns at an apartment building after it was hit by the shelling of a residential district in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Mstyslav Chernov, File) FILE - A man walks with harbor cranes in the background, at the trade port in Mariupol, Ukraine, Wednesday, Feb. 23, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - Serhiy Kralya, 41, looks at the camera after surgery at a hospital in Mariupol, eastern Ukraine on Friday, March 11, 2022. Kralya was injured during shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - Russian's army tanks move down a street on the outskirts of Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Dead bodies are placed into a mass grave on the outskirts of Mariupol, Ukraine, Wednesday, March 9, 2022 as people cannot bury their dead because of the heavy shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - A body lies covered by a tarp in the street in Mariupol, Ukraine, Monday, March 7, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A man plays with a baby in a bomb shelter in Mariupol, Ukraine, Sunday, March 6, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise after shelling by Russian forces in Mariupol, Ukraine, Friday, March 4, 2022.(AP Photo/Evgeniy Maloletka, File) FILE - Marina Yatsko, left, runs behind her boyfriend Fedor carrying her 18 month-old son Kirill who was killed in shelling, as they arrive at a hospital in Mariupol, Ukraine, Friday, March 4, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise from an air defence base in the aftermath of an apparent Russian strike in Mariupol, Ukraine, Thursday, Feb. 24, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - The lifeless body of a girl killed during the shelling of a residential area lies on a medical cart at the city hospital of Mariupol, eastern Ukraine, Sunday, Feb. 27, 2022. (AP Photo/Evgeniy Maloletka) FILE - A metallurgical plant is seen on the outskirts of the city of Mariupol, Ukraine, Thursday, Feb. 24, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - A hospital window is cracked from shelling in Mariupol, Ukraine, Thursday, March 3, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Evgeniy Maloletka) FILE - An explosion is seen in an apartment building after Russian's army tank fires in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A local resident walks past a damaged vehicle marked with the letter Z, which has become a symbol of the Russian military, in an area that Russian-backed separatists claim to control in the Ukraine city of Mariupol, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - An armed serviceman of Donetsk People's Republic militia walks past a building damaged during fighting in Mariupol, on the territory which is now under the Government of the Donetsk People's Republic control, eastern in Mariupol, Ukraine, Wednesday, April 13, 2022. (AP Photo/Alexei Alexandrov, File) FILE - A building damaged during fighting is seen in Mariupol, Ukraine, on April 13, 2022. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Alexei Alexandrov, File) FILE - A view inside the Mariupol theater damaged during fighting in Mariupol, in territory under the government of the Donetsk People's Republic, eastern Ukraine, Monday, April 4, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Damage is seen on apartment buildings after shelling from fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Ukrainian emergency employees and volunteers carry an injured pregnant woman from a maternity hospital damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. The woman and her baby later died. (AP Photo/Evgeniy Maloletka, File) FILE - A man rides his bicycle past a body covered by a rug after fighting on the outskirts of Mariupol, Ukraine, in territory under control of the separatist government of the Donetsk People's Republic, on Tuesday, March 29, 2022. (AP Photo/Alexei Alexandrov, File) FILE - Premature babies who were left behind by their parents lay in a bed in hospital number 3 in Mariupol, Ukraine, Tuesday, March 15, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Marianna Vishegirskaya stands outside a maternity hospital that was damaged by shelling in Mariupol, Ukraine, Wednesday, March 9, 2022. (AP Photo/Mstyslav Chernov, File) FILE - People look at a burning apartment building in a yard after shelling in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A woman reacts as she stands with her daughter as she waits for her husband to evacuate from a burning apartment in Mariupol, Ukraine, Sunday, March 13, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A Ukrainian serviceman guards his position in Mariupol, Ukraine, Saturday, March 12, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Mstyslav Chernov, File) FILE - A fire burns at an apartment building after it was hit by the shelling of a residential district in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Mstyslav Chernov, File) FILE - A man walks with harbor cranes in the background, at the trade port in Mariupol, Ukraine, Wednesday, Feb. 23, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - Serhiy Kralya, 41, looks at the camera after surgery at a hospital in Mariupol, eastern Ukraine on Friday, March 11, 2022. Kralya was injured during shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - Russian's army tanks move down a street on the outskirts of Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Dead bodies are placed into a mass grave on the outskirts of Mariupol, Ukraine, Wednesday, March 9, 2022 as people cannot bury their dead because of the heavy shelling by Russian forces. (AP Photo/Evgeniy Maloletka, File) FILE - A body lies covered by a tarp in the street in Mariupol, Ukraine, Monday, March 7, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A man plays with a baby in a bomb shelter in Mariupol, Ukraine, Sunday, March 6, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise after shelling by Russian forces in Mariupol, Ukraine, Friday, March 4, 2022.(AP Photo/Evgeniy Maloletka, File) FILE - Marina Yatsko, left, runs behind her boyfriend Fedor carrying her 18 month-old son Kirill who was killed in shelling, as they arrive at a hospital in Mariupol, Ukraine, Friday, March 4, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - Smoke rise from an air defence base in the aftermath of an apparent Russian strike in Mariupol, Ukraine, Thursday, Feb. 24, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - The lifeless body of a girl killed during the shelling of a residential area lies on a medical cart at the city hospital of Mariupol, eastern Ukraine, Sunday, Feb. 27, 2022. (AP Photo/Evgeniy Maloletka) FILE - A metallurgical plant is seen on the outskirts of the city of Mariupol, Ukraine, Thursday, Feb. 24, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Sergei Grits, File) FILE - A hospital window is cracked from shelling in Mariupol, Ukraine, Thursday, March 3, 2022. Russia began evacuating its embassy in Kyiv, and Ukraine urged its citizens to leave Russia. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin's invasion plans. (AP Photo/Evgeniy Maloletka) FILE - An explosion is seen in an apartment building after Russian's army tank fires in Mariupol, Ukraine, Friday, March 11, 2022. (AP Photo/Evgeniy Maloletka, File) FILE - A serviceman stands at a building damaged during fighting in Mariupol, Ukraine, on April 13, 2022. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin’s invasion plans. More than six weeks after the Russian siege began, Ukrainian troops are continuing to fight the vastly superior Russian forces in ferocious battles amid the ruins of what once was a bustling city on the Sea of Azov coast. (AP Photo/Alexei Alexandrov, File) FILE - Graves of local residents who died during the fighting with Russia are seen in a street behind private houses in the Ukraine city of Mariupol, on April 13, 2022. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin’s invasion plans. More than six weeks after the Russian siege began, Ukrainian troops are continuing to fight the vastly superior Russian forces in ferocious battles amid the ruins of what once was a bustling city on the Sea of Azov coast. (AP Photo/Alexei Alexandrov, File) FILE - A building damaged during fighting is seen in Mariupol, Ukraine, on April 13, 2022. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin’s invasion plans. More than six weeks after the Russian siege began, Ukrainian troops are continuing to fight the vastly superior Russian forces in ferocious battles amid the ruins of what once was a bustling city on the Sea of Azov coast. (AP Photo/Alexei Alexandrov, File) FILE - A local resident walks past a damaged vehicle marked with the letter Z, which has become a symbol of the Russian military, in the Ukraine city of Mariupol, on April 13, 2022. Unbroken by a Russian blockade and relentless bombardment, the key port of Mariupol is still holding out, a symbol of staunch Ukrainian resistance that has thwarted the Kremlin’s invasion plans. More than six weeks after the Russian siege began, Ukrainian troops are continuing to fight the vastly superior Russian forces in ferocious battles amid the ruins of what once was a bustling city on the Sea of Azov coast. (AP Photo/Alexei Alexandrov, File)