GARDEN GROVE, Calif. — Authorities say a motorist involved in a single-vehicle crash and a person who stopped to help were struck by a car and killed on a Southern California freeway.

The California Highway Patrol says both crashes happened around 2 a.m. Monday along westbound State Route 22 in Garden Grove.

KABC-TV reports both victims were standing outside the crashed vehicle when they were hit.

No arrests were immediately reported. All westbound lanes were shut down during the investigation.