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Army blimp breaks loose, drifts for hours over Pennsylvania

An unmanned Army surveillance blimp floats through the air while dragging a tether line just south of Millville, Pa., Wednesday, Oct. 28, 2015. The bulbous, 240-foot helium-filled blimp came down near Muncy, a small town about 80 miles north of Harrisburg. The North American Aerospace Defense Command in Colorado said the blimp detached from its station at the military's Aberdeen Proving Ground in Maryland.  (Jimmy May/Bloomsburg Press Enterprise via AP)
An unmanned Army surveillance blimp floats through the air while dragging a tether line just south of Millville, Pa., Wednesday, Oct. 28, 2015. The bulbous, 240-foot helium-filled blimp came down near Muncy, a small town about 80 miles north of Harrisburg. The North American Aerospace Defense Command in Colorado said the blimp detached from its station at the military's Aberdeen Proving Ground in Maryland. (Jimmy May/Bloomsburg Press Enterprise via AP) An unmanned Army surveillance blimp floats through the air while dragging a tether line just south of Millville, Pa., Wednesday, Oct. 28, 2015. The bulbous, 240-foot helium-filled blimp came down near Muncy, a small town about 80 miles north of Harrisburg. The North American Aerospace Defense Command in Colorado said the blimp detached from its station at the military's Aberdeen Proving Ground in Maryland. (Jimmy May/Bloomsburg Press Enterprise via AP)

MUNCY, Pa. (AP) – An unmanned Army surveillance blimp broke loose from its mooring at a Maryland military facility and floated over Pennsylvania for hours, causing electrical outages as its tether hit power lines.

Two fighter jets were scrambled to follow the 240-foot helium-filled blimp on Wednesday. It eventually came down near Muncy, a small town about 80 miles north of Harrisburg, the state capital. No injuries were reported.

The blimp, fitted with sensitive defense technology, escaped from the military’s Aberdeen Proving Ground around 12:20 p.m. Authorities say it drifted northward, climbing to about 16,000 feet. It covered about 150 miles over about 3½ hours.

About 27,000 utility customers in two counties were left without power. Electricity was restored to most people within a few hours.

It’s not known why the blimp broke loose.