At least one person has died, and one person remains unaccounted for, while at least 10 people have been injured following an explosion at the U.S. Steel Clairton plant on Monday.

First responders were alerted to the incident just before 11 a.m. Emergency workers were dispatched to rescue those trapped under rubble, according to The Associated Press.

Sources relayed to KDKA-TV that the explosions occurred inside the "reversing room" of the 13/15 battery. The room acts as a mechanical regulator, making sure the coal bakes evenly in the oven. The plant has since been stabilized, officials said in an afternoon press conference.

Allegheny County police confirmed at least one fatality. The status of those injured remains unknown, police said.

Multiple people have been injured after an

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