LOS ANGELES, July 18 (Xinhua) -- Three detectives were killed Friday morning in an explosion at a police training facility in Southern California, authorities confirmed.

LOS ANGELES, July 18 (Xinhua) -- At least three deputies were killed Friday morning in an explosion at a police training facility in Southern California, according to authorities and local media.

美国西岸时间周五（18日）一早，位于洛杉矶闹区以东的洛杉矶郡警长办公室培训中心传出巨响，稍晚确认发生了爆炸案，已知至少3人丧生，均为警察。联邦干员与地方当局已确认此事并到场调查，事发原因仍待厘清。