A California Highway Patrol accident investigation team has begun work to find out what caused a crash on Interstate 5 on Sunday that left four people dead and at least seven people injured.
"We don't have a cause to release as of yet," CHP spokesman Officer Michael Bradley said Monday. "Initially, we are investigating an unsafe turning movement that caused the car to leave the roadway."
The CHP said a 2004 Ford Expedition was headed south on I-5 about 3:30 p.m. when the driver lost control for unknown reasons.
The SUV crossed over the median strip north of Hood-Franklin Road, where there is no center divider, and entered the northbound lanes. There, the SUV hit a 2012 Honda Accord and a 1997 Toyota Rav4 towing a boat.
Four people were pronounced dead at the scene. Their names were unavailable Monday.
Northbound I-5 at Twin Cities road in Galt was closed for about eight hours so that the CHP could begin its look into the crash.
The Multidisciplinary Accident Investigation Team will conduct an in-depth investigation and analysis of the major traffic collision. CBS 13 reported that tire tread was missing from the Expedition, which could be indicative of tire failure being a possible cause.
The Expedition had nine people inside. Three were killed and six injured.
The driver, tentatively identified as a man in his 50s from Berkeley, died, according to the CHP. Also killed in the Expedition was a 70-year-old woman from Berkeley and a 48-year-old woman from Lathrop.
The six injured in the Expedition were two people from Lathrop: a woman in her 40s and a 17-year-old boy. Also injured in the SUV were four people from Berkeley: three women ages 18, 19 and 23 and a 20-year-old man. Their injuries ranged from broken wrists and ribs to major trauma.
The fourth person to die in the crash was the driver of the Honda Accord, a man in his 50s. A passenger in his car from Lincoln suffered major injury.