A man is hospitalized following a grisly car crash on eastbound Highway 4 Thursday in Martinez.
The collision occurred around 2:30 p.m. near Frankling Canyon Road and snarled traffic.
The driver of a black Ford F-150 told NBC Bay Area he had been driving about 55 miles per hour when he was rear ended, causing him to lose control of the truck.
The truck then flipped over and smacked into a tree, trapping the passenger inside. The driver said he was able to get out safely and free his friend, who was sent to John Muir Hospital in Walnut Creek with head injuries sustained from broken glass.
According to the driver, the car that hit his truck drove off without stopping.
California Highway Patrol Officer Tim Leviste said the cause of the crash is still under investigation. Despite about two dozen beer cans littering the crash site, alcohol doesn not appear to be a factor, he said.
Gillian Edevane covers Contra Costa County for NBC Bay Area. Contact her at Gillian.Edevane@NBCuni.com