MUNCY, Pa. - The Army is sending a two-person accident-investigation team to Pennsylvania to look into why a military surveillance blimp came loose from its mooring in Maryland and floated away. 

Pennsylvania police are using shotguns to deflate the wayward blimp.

The blimp, fitted with sensitive defense technology, escaped Wednesday from Aberdeen Proving Ground. Its dangling tether caused power outages in Pennsylvania before the aircraft came down into trees in a ravine near Muncy. No one was injured.

Michael Negard, spokesman for the Army Combat Readiness Center, says the investigators are from Fort Rucker, Alabama.

He says the investigation is considered "Class A," a label applied to an event that might have caused at least $2 million in property damage; involved a destroyed, missing or abandoned Army aircraft or missile; or caused injury.