One dead, 10 hospitalised in Pennsylvania steel plant explosions

"Multiple explosions occurred today at U.S. Steel Clairton Coke Works," the state's Governor Josh Shapiro said in a post on X, naming a plant some 15 miles (25 kilometers) outside the city of Pittsburgh.

"Injured employees have now been transported to local hospitals to receive care, and search-and-rescue efforts remain active at the plant," he added.

One person was still believed to be missing Monday night, according to Allegheny County Police, which confirmed in a statement there had been one fatality.