Three Los Angeles County Sheriff’s Department deputies were killed Friday in an explosion at a training facility in East Los Angeles, a tragedy Sheriff Robert Luna called his agency’s deadliest day since 1857.

Officers spent hours searching a Santa Monica apartment building where the device that exploded and killed three deputies may have originally come from.

Local, federal and state officials are beginning their investigations into the explosion at an East Los Angeles sheriff’s training facility that killed three deputies Friday morning, Sheriff Robert Luna said.

This is unfortunately the largest loss of life for us as the LA County Sheriff’s Department since 1857,” Luna said.

The Los Angeles County Sheriff Robert Luna discussed the department's procedures for transferring inmates already in custody over to Immigration and Customs Enforcement during a press conference Thursday afternoon.

The DOJ says it wants info on undocumented immigrants with criminal records. LA County Sheriff Robert Luna says his department doesn't have info on inmates' citizenship status.

A Villanueva for Sheriff 2026 committee has registered with the Secretary of State's office, but it is unclear whether this means former Los Angeles County Sheriff Alex Villanueva plans to challenge incumbent Robert Luna and seek a return to office. Luna defeated Villanueva, 59.8% to 40.2%, on Nov. 8, 2022.