But at the same time, the man driving the Chevy corrected his vehicle, veering back into his original northbound lane, based on the CHP's initial investigation. The two vehicles collided, ending up in the southbound lane.

The boy, about 6 years old, was reported to be unconscious at the crash. Bystanders gave CPR to the boy before emergency responders arrived, according to initial CHP reports.

Helicopters arrived from the CHP and the Sonoma County Sheriff's Office and airlifted the boy and the woman who were riding in the Chevy, Garcia said.

The boy was taken to Queen of the Valley Medical Center where he was pronounced dead, Garcia said. The man driving the Chevy was taken by ambulance to Queen of the Valley with moderate to major injuries, CHP Officer Jaret Paulson said.

The Chevy's female passenger suffered major injuries, Paulson said.

The man and woman in the Lexus rode in an ambulance to Queen of the Valley, the woman to be treated for moderate to major injuries. The man likely only received minor injuries, Garcia said.

The CHP has not yet released the names of anyone involved in the crash.

It does not appear that drugs or alcohol contributed to the crash, Garcia said.