The Mower County Sheriff's Office was conducting an investigation about a suspected arson case in Waltham on Sunday, and during a search of a farm in Dodge County they discovered what appeared to be a rocket-propelled grenade.

According to KAAL TV, the St. Paul bomb squad and Air Force ordinance disposal unit examined it using x-rays and determined that there were no explosives in it. However they did not know whether the fuse was still good or not. They detonated the device around 9PM.

The Dodge County Attorney's office is going to review the case for possible charges.