Preparations for a routine maintenance task may have led to an explosion at a U.S. Steel coal-processing plant near Pittsburgh that left two dead and sent 10 to hospitals, the company said Friday. U.S.

Pittsburgh Action News 4 has confirmed at least two people have died and nine others have been injured after multiple explosions occurred at the U.S. Clairton Coke plant in Pennsylvania.

By the time the scene was secure, two people were dead and more than 10 others were injured, including one who spent hours trapped in rubble left Monday by the blast that was powerful enough to shake nearby homes.