Multiple people have been injured in Pennsylvania, and several medical helicopters have been dispatched to the area.

An explosion occurred Monday at a steel factory in Clairton, Pennsylvania, authorities said. A spokesperson for Allegheny County said a rescue operation was underway at U.S. Steel Clairton Coke Works for people trapped under the rubble.

Two people have died and 10 are injured following an explosion at a Pennsylvania steel plant on Monday, Allegheny County police said. The incident at the U.S. Steel Clairton Coke Works plant in Clairton, about 15 miles outside of Pittsburgh, trapped people under rubble, prompting a rescue operation, according to Allegheny County officials.