Motorists are being asked to avoid the Lakeville Highway-Highway 116 area as a large injury crash is being investigated.
A Dodge Charger, two SUVs and perhaps a fourth vehicle, were involved in the 5:15 p.m. crash, according to CHP reports.
One person with a head injury was flown by helicopter from the scene, on Lakeville Highway near Stage Gulch Road, south of Ernie's Tin Bar. Two others were also injured.
Just before 6 p.m., the CHP issued an alert that lanes were blocked and major backups were occurring in both directions.
The were reports of drivers turning around in the lanes, causing further traffic problems.