The mill, which is part of the recent merger between U.S. Steel and Nippon Steel, has faced scrutiny from federal and local ...

An explosion at a U.S. Steel plant south of Pittsburgh has killed two people and injured 10 others. One worker was rescued ...

Officials are working to determine the cause of an explosion that rocked a steel plant outside Pittsburgh, leaving two dead and 10 injured ...

Explosions at Clairton Coke Works, a U.S. Steel plant near Pittsburgh, left one dead, two missing and at least seven others in hospitals, with emergency workers searching for victims.