The company said pressure likely built up inside the valve, causing it to fail and leading to coke oven gas filling the area, ...

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

Workers were heating coal and preparing for routine maintenance when an explosion rocked a U.S. Steel plant outside ...

U.S. Steel Clairton Coke Works' current limited coke-making capacity due to Monday's explosion is prompting concerns.

Authorities confirmed a second fatality after an explosion at the U.S. Steel Clairton Coke Works facility outside of ...

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

An explosion at a U.S. Steel plant south of Pittsburgh killed two people and injured more than 10 others. The CEO has vowed ...

Workers returned​ to U.S. Steel Clairton Coke Works on Tuesday morning, one day after an explosion killed two people.

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

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