The Highway Patrol is investigating a head on crash that killed four people and critically injured a fifth northeast of Buttonwillow.
The accident happened just before 9:00 Thursday night on 7th Standard Road just east of Interstate 5 when a pickup drifted into the eastbound lanes and collided with a sedan.
A woman riding in the pickup is hospitalized with major injuries. Three people in the sedan and the pickup driver died at the scene. The cause of the crash is under investigation.