Authorities are searching for a missing “military-style” grenade linked to an explosion that killed three Los Angeles sheriff’s deputies last week.

Los Angeles County Sheriff Robert Luna announced that one of the two grenades transported to the Biscailuz Center Training Academy prior to a deadly explosion remains unaccounted for.

A grenade is missing from the scene of an explosion at a Los Angeles County Sheriff’s Department training facility that killed three members of its arson and explosives unit, authorities said Friday.