Three Killed in Explosion at LA County Sheriff's Training Facility

On Friday, at least three deputies were killed and another one was injured in an explosion at the Los Angeles County Sheriff's Department's Biscailuz Training Center, according to law enforcement sources.

The explosion took place around 7:30 am at the center on Eastern Avenue, which is home to the sheriff's special enforcement bureau, including the bomb squad.

The injured individual was taken to a hospital after the explosion, authorities said. 

Preliminary information claimed that deputies were moving a recently recovered from a bomb call out when the blast occurred, according to two law enforcement sources. 

After the explosion, LAPD's bomb squad responded to the scene. The FBI and the Bureau of Alcohol, Tobacco, Firearms and Explosives also responded to assist with the investigation.

Employees told The Times they heard a massive blast shortly before 7:30 am coming from the parking lot where the sheriff's bomb squad keeps its vehicles. 

They heard glass shattering and screaming.

In the radio communications reviewed by The Times, a sheriff dispatcher tells units that there was an "explosion with three down." 

She later advises that a sheriff's weapons team leader said investigators should "not approach" the scene at the time.