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Gas valve failure during routine maintenance work may have led to fatal explosion, US Steel says

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

Investigators release new details on what caused the US Steel Clairton Coke Works explosion

U.S. Steel has released new details on what investigators believe caused the explosion at the Clairton Coke Works plant.
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‘It Didn’t Have to Be This Way’: After Another Explosion at Clairton Coke Works, Advocates Call for Accountability

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

Explosions at US Steel's Clairton Mill in Pennsylvania: What to Know

Multiple people have been injured in Pennsylvania, and several medical helicopters have been dispatched to the area.

Live updates: Explosion at US Steel plant in Pittsburgh leaves people trapped under rubble

An explosion at a U.S. Steel coking plant near Pittsburgh has left people trapped under the rubble. Here's what we know.