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Train traffic moving again through Arizona derailment site

A Union Pacific train derailed on the east side of Interstate-10 just north of Twin Peaks Road in Marana, Ariz., Tuesday, July 10, 2018. Authorities say heavy rain from a monsoon storm in southern Arizona has caused a train derailment in Marana. Northwest Fire District officials say about 20 cars went off the rails around 3 p.m. Tuesday as a strong storm was going through the Marana area near Interstate 10. (Kelly Presnell/Arizona Daily Star via AP)

MARANA, Ariz. — Rail traffic resumed Wednesday through a derailment site in Marana on the outskirts of Tucson on Union Pacific tracks that are a main freight route between Texas and California.

Union Pacific said 27 freight cars derailed Tuesday on tracks parallel to Interstate 10 during heavy monsoon rains. No injuries were reported.

Crews worked overnight to clear one of the two tracks, allowing train traffic to resume through the derailment site at reduced speeds. Work on the second track continues.

Running water was reportedly on the tracks when firefighters arrived at the derailment site, but Union Pacific spokesman Jeff DeGraff said cause of the derailment remains under investigation.

DeGraff said the derailed cars carried consumer and manufactured goods but that no hazardous materials were released or involved in the derailment.

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