Gunman sought after shots fired in I-580 road-rage incident

California Highway Patrol officials are on the hunt for the driver of a gray 2005 Volvo S60 Sedan with license plate number 7ENK356, who is suspected in a Thursday afternoon shooting on Interstate 580. California Highway Patrol officials are on the hunt for the driver of a gray 2005 Volvo S60 Sedan with license plate number 7ENK356, who is suspected in a Thursday afternoon shooting on Interstate 580. Photo: Handout, Courtesy California Highway Patrol Photo: Handout, Courtesy California Highway Patrol Image 1 of / 4 Caption Close Gunman sought after shots fired in I-580 road-rage incident 1 / 4 Back to Gallery

A pistol-packing driver who fired at least three shots at another motorist in an East Bay road-rage incident on Interstate 580 is being sought by California Highway Patrol officers who recovered a clue he left behind at the scene — his front bumper with the license plate attached.

The shooting occurred on westbound Interstate 580, west of Regatta Boulevard in Richmond, at 5:48 p.m. Sunday after the two drivers began to brake-check and cut each other off starting on Interstate 80 in Emeryville, CHP officials said.

The drivers eventually pulled up next to each other and got into a heated argument. That’s when, officers said, the driver of a gray 2005 Volvo S60 pulled out a pistol and fired three shots at the other car.

The gunman fled the scene after the shooting, exiting at Regatta Boulevard, where he crashed into a pole. The wreck disconnected the front bumper and license plate, which the driver left at the scene.

Officers described the driver as a black adult in his 20s with a shaved head. He was last seen wearing a white T-shirt. A female adult passenger in her 20s is also being sought by officers.

The Volvo’s license plate number is 7ENK356.

No injuries were reported in the incident.

It was the latest in an alarming series of recent highway shootings in the Bay Area. Last week, a woman was killed and a man was injured in a shooting on Highway 4 in Pittsburg.

CHP officials are asking anyone with information to call them at (800) 835-5247.

Kevin Schultz is a San Francisco Chronicle staff writer. Email: kschultz@sfchronicle.com Twitter: KevinEdSchultz