Officials are investigating after a body was pulled from the Mon River near the South Side Marina Tuesday evening.

Allegheny County Emergency Services said a fire at the plant in Clairton started late Monday morning. Officials said they had not isolated the cause of the blast.

U.S. Steel’s Clairton Coke Works plant, where an explosion killed two people and injured 10 others. Among them is a local mayor who said he was working when the deadly blast happened.

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