Allegheny County Emergency Services said a fire at the plant in Clairton started late Monday morning. Officials said they had not isolated the cause of the blast.

CLAIRTON, Pa. (TNND) — An investigation is ongoing after two people were killed and 10 were injured in an explosion at a U.S.

CLAIRTON, Pa. (AP) — An explosion at a U.S. Steel plant near Pittsburgh left two dead and sent at least 10 to hospitals Monday and heavily damaged the sprawling facility, officials said.

PITTSBURGH, Pa. (Gray News) - One of the two people who died after an explosion at the U.S. Steel Clairton plant has been ...

Authorities said their investigation has shifted to the cause of the explosion after they accounted for everyone who was missing.

Several people appear to have been injured at a mill in Western Pennsylvania. WPXI reported that emergency crews were sent to a reported explosion at the U.S. Steel Clairton Coke Works. The mill is ...