At least one person remains unaccounted for while dozens 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.

Others were trapped under rubble, with emergency workers on site trying to rescue them, according to The Associated Press.

Sources that the explosion 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.

UPMC officials confirmed to KDKA-TV that they have received two patients at UPMC Mercy Hospital.

An Allegheny Health Network spokesperson also confirms that "multiple AHN hospitals are receiving inbound patients."

At least five patients were transported to Jefferson Hospital, one patien

See Full Page