LOS ANGELES -- A grenade is missing from the scene of an explosion that killed three Los Angeles County sheriff's deputies, authorities said Friday. The July 18 blast at a sheriff's department training facility killed three experienced deputies on the arson and explosives team.

Senior law enforcement officials said the LASD bomb squad responded to a garage in Santa Monica yesterday, where at least one grenade was found. It was transported to the training facility, where the deputies were working to render it safe,

Three Los Angeles County sheriff’s deputies assigned to the arson explosives detail were killed in an explosion at a law enforcement training facility.