A veteran investigator, a respected mentor and a skilled technician — the t hree arson investigators killed in an explosion at the Biscailuz Center in East LA were remembered as the “best of our department” by Los Angeles County Sheriff’s Department leaders.

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

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,