It marks another step in the company's expansion in Pittsburgh following its acquisition of U.S. Steel.

An explosion at a U.S. Steel plant near Pittsburgh on Monday has killed one person and injured multiple others, with at least two people missing, police said, as fire crews could be seen battling ...

Multiple explosions at a steel plant near Pittsburgh have killed two people and left 10 others injured on Monday, according to authorities. Video captured a massive black plume of smoke rising from ...

An explosion at a U.S. Steel plant near Pittsburgh has left dozens injured or trapped under the rubble, with emergency workers on site trying to rescue them. And now, one fatality has been confirmed ...

The fatal explosion last week at U.S. Steel's Pittsburgh-area coal-processing plant has revived debate about its future just as the iconic American company was emerging from a long period of ...

Allegheny County Emergency Services said a fire at the plant in Clairton started late Monday morning. Officials said they had not isolated the cause of the blast. The Clairton Coke Works, a U.S. Steel ...

NEW YORK (AP) — United States Steel on Tuesday detailed its billion-dollar multiyear growth plan with new owner Nippon Steel that includes modernizing the century-old steelmaker. The announcement ...

FILE - Part of the U.S. Steel Clairton Coke Works is seen May 2, 2019, in Clairton, Pa. (AP Photo/Gene J. Puskar, File) An explosion at a U.S. Steel plant near Pittsburgh left one dead and dozens ...

HARRISBURG, Pa. — The fatal explosion last week at U.S. Steel's Pittsburgh-area coal-processing plant has revived debate about its future just as the iconic American company was emerging from a long ...