Flames and heavy smoke billow out of the plant owned by US Steel as firefighters struggle to extinguish the fire.
Published On 12 Aug 2025
Multiple explosions at a US Steel plant near Pittsburgh, Pennsylvania have killed two people and injured 10, according to the company and local authorities.
The blasts at the Clairton Coke Works – part of a sprawling industrial complex along the Monongahela River – took place just before 11am Eastern Time (15: 00 GMT) on Monday.
Firefighters battled flames and heavy smoke that billowed out of the plant, which is owned by US Steel, a subsidiary of Nippon Steel.
Initially, two people were reported missing. One person was found and transported to a local hospital, said Allegheny County Police Assistant Superintendent Victor Joseph at an afternoon briefing.
There was no word yet on the possible cause of the explosion.
The investigation into the explosion would be “a time-consuming technical investigation”, Joseph said.
David Burritt, president and chief executive officer of US Steel, said in a statement that the company was working with local authorities to discover the cause.
Pennsylvania Governor Josh Shapiro posted on X that there were multiple explosions at the plant and that his administration was in touch with local officials.
“The scene is still active, and folks nearby should follow the direction of local authorities,” he wrote at the time the employee was missing.
The severity of the injuries was not known, but