Rescuers were continuing to search for one missing worker at the Clairton Coke Works more than five hours after mid-morning explosions rocked the Mon Valley plant. The blasts killed one person and injured 10.

Neighbors of U.S. Steel's Clairton Coke Works and the plants' workers react to the explosion at the plant on Monday that killed two and sent 10 to the hospital.

A massive explosion at the Clairton Coke Works steel plant in Pennsylvania on Monday morning left multiple people injured, officials reported. Emergency crews quickly responded as thick smoke billowed from the site. The full extent of the injuries remains unclear, according to Pittsburgh’s Action News 4, as reported by The Daily Mail.