The Los Angeles County Sheriff's Department (LASD) confirmed multiple deputies are dead after an explosion Friday morning at the agency's training facility in East Los Angeles.The explosion, which happened at about 7:25 a.m. local time at the Biscailuz Training Center, killed at least three sheriff's deputies, LASD sources told Fox News.HUMAN REMAINS DISCOVERED DAYS AFTER DEVASTATING CALIFORNIA FIREWORKS FACILITY EXPLOSIONSources said it appears an accident occurred when deputies were moving ordinances on the training facility property.Ambulances were requested for injuries and the facility was evacuated, according to L.A. County Fire.The Federal Bureau of Investigation (FBI) in Los Angeles confirmed it is responding.SEVEN MISSING AFTER POWERFUL EXPLOSION AT CALIFORNIA FIREWORKS FACILITY AS EVACUATION ORDERS REMAIN IN PLACEAttorney General Pam Bondi wrote in an X post that she spoke with Bill Essayli, U.S. Attorney for the Central District of California, regarding the "horrific incident.""I just spoke to @USAttyEssayli about what appears to be a horrific incident that killed at least three at a law enforcement training facility in Los Angeles," Bondi wrote. "Our federal agents are at the scene and we are working to learn more. Please pray for the families of the sheriffs deputies killed."This is a developing story. Check back for updates.Fox News Digital's Tessa Hoyos contributed to this report.