BRENTWOOD, Calif. (AP/CBS) — Three people were killed Sunday afternoon when an Amtrak commuter train smashed into a car in Northern California, authorities said.

The crash occurred at around 1 p.m. in Brentwood, about an hour's drive southeast of San Francisco, the California Highway Patrol reported.

Three people were declared dead at the scene. Three others, including a child, suffered major injuries and were taken to John Muir Medical Center, according to Contra Costa County Fire Protection District.

The victims were inside the four-door sedan when it was struck. The car came to rest about 60 feet away from the tracks.

According to The San Francisco Chronical, the crash happened in a rural area without rail guards or signals at the crossing.

There were 80 people aboard the Amtrak train but nobody was hurt, officials said.

The crash was under investigation.

(© Copyright 2022 CBS Broadcasting Inc. All Rights Reserved. The Associated Press contributed to this report.)