Workers were heating coal and preparing for routine maintenance when an explosion rocked a U.S. Steel plant outside Pittsburgh

Two people are dead and 10 others injured after an explosion at U.S. Steel’s Clairton Coke Works near Pittsburgh. The recovery operation has ended, and the cause is under investigation.

The deadly explosion at Clairton Coke Works near Pittsburgh occurred when a gas valve was flushed before planned maintenance, U.S. Steel said in preliminary findings.

The Pennsylvania county where an explosion at a U.S. Steel plant south of Pittsburgh killed two people and injured more than 10 others announced Thursday that it is stepping up air quality monitoring in the area of the sprawling facility that has a troubled environmental record.

Two killed and 10 injured after multiple explosions rock Pittsburgh area steel plant - Locals were told to close windows and doors following the explosion

The incident was at the U.S. Steel Clairton Coke Works plant in Clairton. One victim has been identified as Timothy Quinn, a father of three. The second individual, who was found dead on Monday night, has not yet been identified.