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,

A deadly explosion that shook a law enforcement training facility in Los Angeles early Friday was being investigated as a possible training accident, officials said. Three members of the Los Angeles County Sheriff’s Department died in the explosion reported around 7:30 a.