OAKLAND -- Police are asking for the public's help in identifying people involved in illegal sideshow activity that ended with a shooting caught on video early Saturday.

Police said that about 4:15 a.m. a Mazda and a Camaro involved in illegal sideshow activity collided in the 2500 block of Middle Harbor Road at the Port of Oakland. Those in the two cars fought and several rounds were fired before those involved left the area.

Police said they checked Highland Hospital for gunshot wound victims but none have come in for treatment. Investigators said shell casings were found in the street.

In the short video, posted on YouTube, a woman yells at others after her car is damaged. The crowd responds by further damaging her car, including one person standing on the car's hood and firing several shots from a semi-automatic pistol directly into the windshield.

As the crowd disperses, another burst of gunfire from a fully automatic weapon can be heard. The person firing is not seen on the video.

Sideshows, the reckless car stunt spectacles that can involve hundreds of motorists speeding through city streets and spinning "doughnuts" at major intersections, are not new. They've been around for years, but returned in full force this year after many years of near-dormancy.

A sideshow in early June at the intersection of 106th Avenue and MacArthur Boulevard ended in gunfire that wounded three people, including a 25-year-old Walnut Creek woman. A brazen Saturday-afternoon sideshow brought traffic on Interstate 880 to a complete halt in January.

That incident was Oakland's first sideshow-related shooting in two years. Anyone with information is asked to call Oakland police at 510 238-3426 or a tip line at 855-847-7247.

Contact Kristin J. Bender at kbender@bayareanewsgroup.com. Follow her at Twitter.com/kjbender.