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. near Brentwood, about an hour's drive southeast of San Francisco, the California Highway Patrol reported. Three people died at the scene. Two adults and a child were taken to hospitals but there was no immediate word on their conditions, KRON-TV reported.The victims were inside the four-door sedan when it was struck. The car came to rest about 60 feet away from the tracks.There were 89 people aboard the Amtrak train but nobody was hurt, officials said.Amtrak released the following statement: "According to the Federal Railroad Administration (FRA), trespassing along railroad rights-of-way is the leading cause of rail-related deaths in America, and railroad crossing incidents are the second leading cause of rail-related deaths in America. These incidents can affect everyone involved—those who are injured or die and their families, our train crews, and our passengers. They also serve as critical reminders about the importance of obeying the law and of exercising extreme caution around railroad tracks and crossings. Amtrak continues to work closely with Operation Lifesaver (OLI) to #STOPTrackTragedies by emphasizing the obvious dangers of being on railroad property or disregarding warnings at rail crossings. For more railroad safety information, please visit StayOffTheTracks.org."The crash was under investigation.This is a developing story, stay with KCRA 3 for the latest.