Three Los Angeles County sheriff’s deputies assigned to the arson explosives detail were killed in an explosion at a law enforcement training facility on Friday, the sheriff said.These fatalities at the Biscailuz Training Center in Monterey Park mark the largest loss of life incident for the LA County Sheriff's Department since 1857,

Three members of the arson and explosives unit of the Los Angeles County Sheriff’s Department were killed Friday in a blast at the department's training facility.

Hilda Solis, who serves on the Los Angeles County Board of Supervisors, said in a statement: "My heart goes out to the families, friends, and colleagues of the three individuals who lost their lives ...