Updated

A coroner says a civilian worker killed in a fire and explosion at an Army facility in Pennsylvania died of burns.

The Lehigh County coroner's office on Friday identified the victim as 29-year-old Eric Byers, a resident of central Pennsylvania.

Byers was pronounced dead just after 7 p.m. Thursday at Lehigh Valley Hospital-Cedar Crest. The coroner's office says Byers was handling chemicals when a flash fire occurred.

Four other civilian employees were injured in the fire at Letterkenny Army Depot. The depot's commander says two remain hospitalized in critical but stable condition.

The blast and fire occurred in a painting area for vehicles on Thursday morning at the facility in Chambersburg, about 160 miles (260 kilometers) west of Philadelphia. The cause is under investigation.

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This story has been corrected to say Byers lived in central Pennsylvania, not the Philadelphia suburbs.