The area was blocked off while the Salt lake City bomb squad and a team from Hill Air Force Base assessed the find.
After the investigation, an officer on scene identified the mortar as a Type 89 Grenade Discharger, or knee mortar, which was a Japanese weapon used in the Pacific Theater of WWII. The weapon found today is in pristine condition with the fuse and safety ring well intact.
The officer told ABC4 that a man had discovered the mortar when opening the boxes of a deceased WWII veteran.
The Public Information Officer on scene declined to give further information.