U.S. Steel says preparations for a routine maintenance task may have led to an explosion at a U.S. Steel coal-processing ...

Allegheny County is boosting air monitoring after a deadly explosion at U.S. Steel’s Clairton Coke Works, a plant with a ...

The deadly blast at the U.S. Steel facility outside Pittsburgh was just the latest in a series of recent workplace accidents.

Ten others were injured, and people who live near the plant were urged to stay inside. Three explosions at U.S. Steel’s ...

CLAIRTON, Pa. (AP) — Workers were pushing coke out of huge ovens and preparing for maintenance when an explosion rocked a U.S ...