A collision involving an Amtrak train and a semi-truck in Northern California injured 40 people on Friday, California Highway Patrol officials said.

The accident occurred in Contra Costa County at around 7:15 p.m. on Friday after the driver of a semi-truck truck attempted to cross the tracks near Discovery Bay and was struck by a train carrying 204 passengers.

Two railroad workers, the truck driver and 37 passengers were treated and released at the scene.

The train finally arrived in Bakersfield at 6:40 a.m. Saturday morning.