A serious crash on Alcosta Boulevard over the weekend sent all four occupants of the cars involved to the hospital, San Ramon police said.
At 2:51 p.m. on Sunday afternoon, officers were dispatched to the intersection of Alcosta Boulevard and Old Ranch Road, where two vehicles had collided, police said.
According to Lt. Cary Goldberg, a BMW traveling northbound on Alcosta Boulevard collided with a Lexus turning southbound onto Alcosta from Old Ranch Road. Both cars were totaled, he said.
Speed was a factor in the collision, as was the BMW's failure to stop at a stop sign, Goldberg said, but at this point there is no evidence suggesting that alcohol or drugs were a factor.
The BMW was carrying three people and the Lexus just had the one driver, Goldberg said. All four were transported to the hospital.
Police are still investigating the collision, and no charges have been filed at this time.
The incident led to road closures on both Alcosta Boulevard and Old Ranch Road for several hours, Goldberg said.
Editor's note: Information from the Bay City News Service was used in this story.