Production at the facility could be affected for some time. Two of the plants six batteries of ovens were damaged in the explosion.

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

The Clairton Coke Works, where an explosion killed two workers and injured 10, has a history of maintenance issues, ...

A worker who lived through the explosion and rescue efforts at the U.S. Steel plant in Clairton, near Pittsburgh, tells his story.

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

Workers were pushing coke out of huge ovens and preparing for maintenance when an explosion rocked a US Steel plant outside ...

The company defended its safety record as Investigators worked to determine the cause of the blast.