At least one person has died, and two people remain unaccounted for, while dozens have been injured following multiple explosions 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.

Gov. Josh Shapiro on Monday afternoon said " multiple explosions " took place at the plant and pledged his administration's full support in the aftermath of the event.

Allegheny County police confirmed at least one fatality, while they believe two

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