PHOENIX — Arizona Gov. Doug Ducey ordered flags at state office buildings Thursday be lowered to half-staff in honor of the victims of a school shooting in Florida.

“Our hearts and prayers go out to the victims and everyone impacted by this horrific tragedy,” Ducey said in a release. “In honor and remembrance of them, flags at all state buildings will be lowered to half-staff until sunset on Monday, Feb. 19.”

Ducey’s order was made shortly after President Donald Trump issued a proclamation to fly all flags on public buildings, military facilities, diplomatic sites, naval vessels and other locations at half-staff.

At least 17 people were killed in a shooting at a southeastern Florida high school on Wednesday. Should the number of fatalities hold at 17, it would be the fourth-deadliest school shooting in United States history.

Related: At least 17 killed in shooting at Florida high school

Another 14 people were injured. As of Wednesday night, at least five victims were in life-threatening condition.

“It’s catastrophic,” Broward County Sheriff Scott Israel said. “There really are no words.”

The suspect, 19-year-old Nikolas Cruz, was taken into custody. He was a former student at the school and had been expelled for disciplinary reasons.

Cruz was allegedly armed with an assault-style rifle and had numerous magazines.

A motive is unknown.

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