Explosion at a sheriffs training dept in Los Angeles, takes the lives of three people

MONTEREY PARK (KABC) -- Authorities are investigating an incident at an LASD training facility in Monterey Park. It appears it may have been an explosion and at least three people were killed.
The incident was reported just before 7:30 a.m. Friday at what looked to be LASD's SEB compound, which houses the sheriff's department's special enforcement units and bomb squad.
It appears something may have exploded near a law enforcement vehicle, according to AIR7 footage.
The Los Angeles County Fire Department responded to the scene. It's unclear if there were any other injuries.