Hospital officials confirm seven of the 10 people injured in Monday’s deadly explosion at the U.S. Steel Clairton Coke Works have been released.

The deadly blast at the U.S. Steel facility outside Pittsburgh was just the latest in a series of recent workplace accidents.

HARRISBURG, Pa. (AP) — 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.

The office of the Allegheny County medical examiner identified a second man who was killed in an explosion at the Clairton Coke Works factory Monday morning. According to the medical examiner, 52-year-old Steven Menefee died at the scene of the blast.

Timothy Quinn, 39, of East Huntingdon Township, also died in the incident. Ten other people were injured. Three of them are still hospitalized.

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

A second Westmoreland County man was identified as the other victim who was killed Monday in an explosion at U.S. Steel’s Clairton Coke Works. Steven Menefee, 52, of the village of Tarrs in East Huntingdon,