A person was killed during a multi-vehicle crash Sunday morning on the Orange (57) Freeway in Diamond Bar, authorities said.
The crash occurred about 3:15 a.m on the northbound freeway, just south of the Pomona (60) Freeway, the California Highway Patrol reported.
A SigAlert, issued at 3:40 a.m. closing all northbound lanes of the Orange (57) Freeway, just south of the Pomona (60) Freeway for at least two hours, was extended for an unknown duration at 5:57 a.m.
There was no other immediate information available.