An explosion was reported at the US Steel Clairton plant outside Pittsburgh, Pennsylvania, on Monday, causing multiple injuries and trapping several people, officials say.
Allegheny County Emergency Services spokesperson Kasey Reigner confirmed there were "dozens" of injuries but could not confirm fatalities or a cause, CBS News reported.
Another spokesperson confirmed a rescue operation was underway for people trapped.
Governor Josh Shapiro posted on social media that the state's emergency management services and police had been deployed to the plant.
US Senator John Fetterman wrote on X that he was also at the scene and witnessed "an active search and rescue underway."
