GARY, S.D. (KSFY) - Authorities are investigating after a hand grenade was found at a restaurant in a small northeast South Dakota town.
The grenade was found Monday night at the Alibi in Gary, according to the Deuel County Sheriff's Office.
Employees at the restaurant were doing some remodeling at the restaurant when they found the device. A worker then moved it outside the building.
Sheriff's deputies secured the area until members of the South Dakota Division of Criminal Investigation bomb unit arrived and disposed of the grenade.
Investigators talked with previous owners of the restaurant, and determined the device was at least 40 years old.
Authorities say this model of grenade was not mass produced by the military. However, some people have came into possession of them and filled them with powder to make them an explosive. Since there was no way to tell if it would explode, investigators treated it as an explosive device.