7 injured in Concord when speeding car carrying gunman crashes

CHP officers took three men into custody for their involvement in an alleged shooting and subsequent crash that injured seven people. CHP officers took three men into custody for their involvement in an alleged shooting and subsequent crash that injured seven people. Photo: Courtesy Of CHP Contra Costa Photo: Courtesy Of CHP Contra Costa Image 1 of / 1 Caption Close 7 injured in Concord when speeding car carrying gunman crashes 1 / 1 Back to Gallery

Seven people were injured in a crash on Highway 4 in Concord Monday afternoon when a car with a gunman inside sped through an intersection and collided with four vehicles, officials said.

The incident began around 3 p.m. on westbound Highway 4 near Willow Pass Road, where an off-duty BART police officer noticed one of three men in a Nissan Altima shooting at an unknown target, California Highway Patrol said. No gun shot injuries were reported.

The officer called CHP as the car accelerated, taking the westbound off-ramp to Port Chicago Highway, said Officer John Fransen, a CHP spokesman.

The Nissan collided with four vehicles on Port Chicago Highway while speeding through the intersection at the base of the off-ramp. Seven crash victims, including the three men in the fleeing car, suffered minor to moderate injuries.

All of them were taken to the hospital for treatment. Authorities found a gun in the Nissan and took the three men, aged 19 to 21, into custody.

Officials ask witnesses to the event to call CHP Contra Costa at (925) 646-4980.

Jenna Lyons is a San Francisco Chronicle staff writer. E-mail: jlyons@sfchronicle.com Twitter: @JennaJourno