One week after the explosion at a Los Angeles sheriff's facility that killed three deputies, authorities say they're still looking for one of the explosives involved in the incident.

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

F or the third-straight day, investigations into last week's deadly explosion at a Los Angeles County Sheriff's Department training facility were centered in Marina del Rey on Wednesday.

An explosion that killed three Los Angeles County Sheriff's deputies occurred one day after they responded to a call involving explosives at a Santa Monica complex.

At least three Los Angeles County sheriff's deputies were killed in an explosion at a training facility on Friday, authorities said.

The investigation into the Esparto fireworks explosion, which resulted in seven deaths, is under scrutiny due to concerns about the involvement of the Yolo County Sheriff's Office and potential conflicts of interest.

Investigators served a search warrant on Monday morning, July 21, in Marina del Rey in connection to an explosion that killed three deputies at a Sheriff’s Department facility on Friday, July 18, authorities said.

Three veteran Los Angeles County Sheriff’s Department members assigned to the agency’s arson and explosives detail were killed Friday morning by an explosion at a department training facility, according to Sheriff Robert Luna.

The federal Bureau of Alcohol, Tobacco Firearms and Explosives has taken over the investigation to find the grenade.