A man was killed while a woman sustained injuries on Saturday afternoon, California Highway Patrol officials said, as the three-vehicle accident transpired on Highway 101 near Petaluma, SF Chronicle reported.

A man was traversing in a Chevrolet Silverado as he went south at about 5:44 in the afternoon. He met slow traffic and hit the Ford F250’s rear just south of the Petaluma Boulevard exit, CHP Officer David Derutte said.

Durette said that another car, a Nissan Quest, which was going south then crashed into the two trucks. The Chevrolet and the Ford, meanwhile, hit the center median wall.

Authorities said the driver of the Chevrolet was declared dead at the scene while the female passenger sustained serious injuries and was brought to the hospital.

No immediate information was released yet by the Sonoma County Coroner’s office about the dead driver.

Derutte said that the accident caused all lanes to be blocked for about an hour, but it was reopened by authorities by about 8:50 in the afternoon.

“It was kind of a madness,” Derrute said.

The Ford and Nissan drivers were unscathed.

Derutte said it is not determined yet whether the accident was caused by drugs or alcohol. Investigation on the case continues.