The deadly explosion at Clairton Coke Works near Pittsburgh occurred when a gas valve was flushed before planned maintenance, ...

Preparations for a routine maintenance task may have led to an explosion at a U.S. Steel coal-processing plant near ...

The explosion, followed by several smaller blasts, could be felt in the nearby community and prompted county officials to ...

The preliminary findings say how the company believes the explosion occurred. A union statement cautioned the investigation is in its early stages.

U.S. Steel says it believes a gas valve failure led to the explosion Monday morning at its Clairton Coke Works, in which two ...

U.S. Steel on Friday pinned blame for the deadly explosion Monday at the Clairton Coke Works on a valve failure that led to ...

Todd Barrett was with a crew of laborers at the Clairton coke works that morning when they all felt something. It was an ...

Ten people were hospitalized after the blast at a coke plant in Clairton, Pa., near Pittsburgh. One person who had been ...

U.S. Steel released preliminary findings about the potential cause of Monday's deadly explosion at U.S. Steel Clairton Coke ...

U.S. Steel released preliminary findings about the potential cause of the deadly explosion at U.S. Steel Clairton Coke Works ...

Two workers died and at least 10 people were injured after multiple explosions at the U.S. Steel Clairton plant.

The tragedy has rocked the Mon Valley, and its congresswoman wants answers. Democratic Congresswoman Summer Lee is ...