Two people died, four were injured and one DUI arrest was made following a multivehicle crash on Highway 154 in Buellton early Sunday morning. 

The collision occurred on the S-curve of Highway 154, according to Santa Barbara County Fire public information office Mike Eliason, who said extensive extrication efforts were required to remove victims from the vehicles.  

Just before 2 a.m. Sunday, the driver of a 2007 Nissan SUV, identified as Rigoberto Gracida Paucene, was traveling eastbound on Highway 154, east of Zaca Station Road, at an unknown rate of speed, according to the California Highway Patrol.

Paucene, 30, of Santa Maria, had apparently allowed his vehicle to cross into oncoming westbound traffic, where it crashed into a 2001 Honda Accord traveling westbound.

The driver of the Accord was identified as Hamilton Dias Bonilla, 35, of Santa Maria. Inside his car were passengers Antonio Rafael, 32, of Santa Maria and Ricio Arroyo Cortes, 29, also from Santa Maria.

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The impact caused the Nissan to roll onto its roof, and it was subsequently struck from behind by an oncoming 2000 Dodge minivan driven by 43-year-old Aurelio Salvador Zaragoza of Santa Maria.

Inside his van was 50-year-old Antonia Bautista Santiago of Santa Maria.

Bonilla and Santiago were pronounced dead at the scene, the CHP said. Their next of kin have been notified. 

Zaragoza sustained major injuries; Rafael sustained moderate injuries; and Cortes sustained minor injuries. They all were transported via AMR ambulance to Santa Barbara Cottage Hospital, according to Eliason. 

Paucene was treated for minor injuries and was arrested on suspicion of driving under the influence of alcohol, the CHP said. 

Gina Kim covers crime and courts for Santa Maria Times. Follow her on Twitter @gina_k210