Four injured in blast at Pennsylvania Army depot

LETTERKENNY, Pa. (AP) — Army officials say four people were injured in an explosion and fire at the paint operation of the vehicle shop at an Army depot in Pennsylvania.

Col. Stephen Ledbetter said Thursday that three of the injured workers were flown to Baltimore area hospitals and a fourth was taken by ambulance for medical treatment. He said he did not know the conditions of the injured as of about 10 a.m.

The explosion was reported shortly after 7:15 a.m. Ledbetter said the U.S. Occupational Safety and Health Administration will investigate the cause of the explosion.

The depot is located 160 miles (257 kilometers) west of Philadelphia, or about 55 miles (88 kilometers) southwest of state capital.

Depot staff members were told to stay in their work areas until further notice, as an alarm continued to sound for at least an hour after the explosion.