Unexploded ordnance detonated in S. Arizona

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A rider on horseback spotted the World War II-era mortar shell near the Slaughterhouse Wash. By Jennifer Thomas A rider on horseback spotted the World War II-era mortar shell near the Slaughterhouse Wash. By Jennifer Thomas
By Jennifer Thomas By Jennifer Thomas
By Jennifer Thomas By Jennifer Thomas

SIERRA VISTA, Ariz. (AP) -- Air Force officials disposed of a World War II-era mortar shell by detonating it Tuesday morning.

An explosive ordnance disposal team from Davis-Monthan Air Force Base detonated the 81mm mortar shell at 10:43 a.m. at the southern Arizona military base.

The team also detonated a mortar shell that was found on base in October.

The mortar shell disposed of on Tuesday was spotted by a horseback rider near the Slaughterhouse Wash at the end of the Libby Army Airfield runway.

Fort Huachuca is the home of the Army's Intelligence Center.