A two-vehicle accident in Brentwood injured five on Sunday night including a 12-year-old girl who was flown to UCSF Benioff Children’s Hospital in Oakland for treatment.

East Contra Costa Fire Protection District (ECCFPD) Battalion Chief Craig Auzenne said the girl was not wearing a seatbelt at the time of the collision. She reportedly lost consciousness in addition to suffering facial trauma. Her present condition is unknown.

Four other victims, two women and two men, were transported to the trauma center at the John Muir Medical Center in Walnut Creek with a variety of minor injuries.

The accident that occurred on Sand Creek Road, near the entrance to The Streets of Brentwood Shopping Center, was reported at 6:31 p.m. Brentwood police responding to the incident had few details regarding its cause and said that many of those involved did not speak English. A translator was called to assist the investigation which is ongoing.

Police did confirm that a silver Toyota Corolla with five occupants and a silver Nissan Sentra with two occupants collided in the intersection. One of the vehicles was travelling east on Sand Creek Road after having exited State Route 4. The direction of travel of the other vehicle had not yet been determined

Auzenne said that the accident qualified as a tier 1 mass casualty incident. In addition to the CALSTAR helicopter that landed in the Sprouts parking lot, six medical units and engines from the ECCFPD and the Contra Costa County Fire Protection District were dispatched to the accident location.