3 airlifted to hospitals after blast at Pennsylvania Army depot

CNN: Three people will be airlifted to area hospitals after a small explosion Thursday at Letterkenny Army Depot, according to the Franklin County Office of Emergency Management in Pennsylvania.

Helicopters for the patients are still at the scene, the office said at about 8:30 a.m. ET.

The explosion erupted in a large warehouse, which has been evacuated, emergency officials said.

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