Explosions late Monday morning at Clairton Coke Works in Allegheny County killed two people and injured 10 others, as officials found one person who initially was missing. Katie Boyd’s son was working at the plant when the explosion occurred around 10:30 a.

Two people have died and 10 are injured following an explosion at a Pennsylvania steel plant on Monday, Allegheny County police said.

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