The device that exploded last week at a LASD facility and killed three detectives was a grenade, ABC News sources confirmed.

The investigation into the deaths of three L.A. County deputies, all killed by an explosion of military-style grenades thought to be inert, has made its way from Santa Monica to Marina del Rey wher… ...

It was not known whether the grenades had any connection to the military. The Los Angeles County Sheriff’s Department spokesperson Nicole Nishida said investigators were looking at all leads.

LOS ANGELES (AP) — Authorities are looking into whether grenades recovered from a Santa Monica apartment complex were the cause of an explosion last week at a Los Angeles County Sheriff’s ...

Authorities are looking into whether grenades recovered from a Santa Monica apartment complex were the cause of an explosion last week at a Los Angeles County Sheriff’s Department training facility ...