U.S. Steel says its preliminary investigation found that the blast happened after pressure built up while a gas valve was ...

A devoted dad has been identified as one of the two steel workers killed from an explosion at a Pennsylvania steel plant on ...

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

An explosion at a steel plant in Pennsylvania on Monday has led to an extremely serious situation. The explosion at the plant ...

Allegheny County is increasing air quality monitoring after an explosion at a U.S. Steel plant south of Pittsburgh killed two ...

An explosion at the company’s blast furnace/basic oxygen furnace complex in Pennsylvania occurred during a maintenance procedure, according to the steelmaker.

The fatal explosion last week at U.S. Steel’s Pittsburgh-area coal-processing plant has revived debate about its future just ...

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