(CLAIRTON, Pa.) — One person has died, one is unaccounted for and 10 are injured following an explosion at a Pennsylvania steel plant on Monday, Allegheny County police said.

The incident at the U.S. Steel Clairton Coke Works plant in Clairton, about 15 miles outside of Pittsburgh, trapped people under rubble, prompting a rescue operation, according to Allegheny County officials.

Many of the injuries are non-life-threatening, Allegheny County Emergency Services spokesperson Kasey Reigner said.

“Injured employees have now been transported to local hospitals to receive care, and search-and-rescue efforts remain active at the plant,” Gov. Josh Shapiro on social media. “Lori and I are eternally thankful for the bravery of our first responders — and we continue to pray for the entire Clairto

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