HARRISBURG, Pa. (AP) — Preparations for a routine maintenance task may have led to an explosion at a U.S. Steel ...

The preliminary findings say how the company believes the explosion occurred. A union statement cautioned the investigation is in its early stages.

The deadly explosion at Clairton Coke Works near Pittsburgh occurred when a gas valve was flushed before planned maintenance, ...

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

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

A gas valve failure during maintenance work may have led to the fatal explosion at the U.S. Steel Clairton plant in Pennsylvania.

When horrific situations strike in the Pittsburgh area, such like the U.S. Steel Clairton coke plant explosion that killed ...

University lobbying, Pennsylvania’s history with redistricting, a plea from New Yorkers and Taylor Swift’s big reveal. As ...