CROCKETT -- Emergency crews are responding to a collision with injuries that occurred shortly before 11 p.m.

The solo crash was reported at 10:52 p.m. on eastbound Highway 4 west of the Franklin Canyon Road offramp, according to the California Highway Patrol. A driver reportedly lost control of a vehicle that left the roadway and crashed into bushes along the righthand shoulder of the road.

At least one person was trapped in the vehicle, and Contra Costa Fire crews were preparing to extract the injured person so they could be flown to a hospital.

Check back for updates.