An Oakland man who was fatally shot on Interstate Highway 580 in Richmond early this morning has been identified by the Contra Costa County coroner’s office as 24-year-old Aaron Jackson.Jackson is the city’s 26th homicide victim this year and the sixth in the past eight days, Richmond police Sgt. Bisa French said. The shooting was reported at about 12:05 a.m. on westbound Highway 580 near the Erlandson Street on-ramp, police said.Officers arrived and found the victims’ vehicle near the center divider. Three people were inside the vehicle, two of whom had been shot.Jackson was pronounced dead at the scene. The other two victims were taken to a local hospital and have since been treated and released, French said.Investigators believe at least one suspect shot at the victims from a gray sport utility vehicle that was last seen headed west on I-580. Investigators plan to talk to the two surviving victims today to see if they have any information about who shot at them. Police are also reviewing footage from a surveillance camera that may have recorded the shooting, French said. Two other shootings were reported over the weekend, one earlySunday morning and one Sunday night.The early morning shooting happened at about 3:40 a.m. at 783 Eighth St., Lt. Manjit Sappal said.The department’s ShotSpotter detection system picked up about 20 to 30 shots that were fired and responding officers found three men suffering from bullet wounds, Sappal said.Carl O’Donnell, a 63-year-old Richmond resident, died from his injuries, French said. The other two victims were reported to be in stable condition.The next shooting happened at about 10:30 p.m. Sunday at the intersection of South 37th Street and Cutting Boulevard, Sgt. Mitch Peixoto said. The victim had been driving west on Cutting Boulevard when he stopped at a red light at the intersection, Peixoto said.A suspect driving a black SUV drove up alongside the victim’s vehicle and began firing, hitting him at least once, Peixoto said.The victim was taken to a local hospital in stable condition, he said.The recent spate of shootings in the city began July 5 at about 4:30 a.m. when somebody in a dark-colored SUV shot and killed Rickeasha Washington, 25, on Interstate Highway 80 between Cutting Boulevard and MacDonald Avenue, police said.The second homicide happened at 9:20 p.m. on July 6 in the 2400 block of Lancaster Drive, where police found 34-year-old Richmond resident George Brown fatally shot.The third murder was reported shortly before 11:30 p.m. Tuesday in the 800 block of Alamo Avenue, where police found 40-year-old Antoine Thomas shot to death. A 17-year-old girl was also shot, but is expected to recover. The fourth killing happened Wednesday in the 4700 block of Hartnett Avenue at about 12:15 a.m., where officers found four gunshot victims.Willie Brantley Jr., an 18-year-old Richmond resident, died at the scene and three other victims were taken to the hospital, police said.So far police haven’t been able to connect any of the shootings and haven’t made any arrests, French said today.Anyone with information about the incident should call the homicide section of the Richmond Police Department at (510) 620-6612.