Hayward police on Friday continued to investigate a shooting the night before that left one man dead and possibly another injured, marking the city's fifth shooting incident in less than a week.
In all, eight people were shot over the past week in the city -- one fatally -- and in each case, no one was talking about what happened, police said.
Investigators said they do not believe the five incidents were related. The two victims on Thursday night -- a 22-year-old Hayward man and a 48-year-old Oakland man -- may be associated with the Hells Angels motorcycle club, police said.
Investigators learned about Thursday's shooting just before 5:40 p.m., after receiving multiple 911 calls about a traffic crash on the corner of Saklan Road and West Winton Avenue. Officers found the 22-year-old man fatally shot behind the wheel of a Ford Explorer, said Sgt. Mark Ormsby.
Police were not releasing the man's identity or revealing how many times he was shot.
As police investigated that incident, they learned of another shooting victim who had been dropped off at the Kaiser emergency room in Hayward. That man, the 48-year-old Oakland resident, was eventually transported to Eden Medical Center in Castro Valley. He was shot once in the chest, Ormsby said.
On Friday, the man was stable condition and was expected to survive, and detectives were investigating whether he was with the fatal shooting victim when he was shot.
"We don't know if this was because of road rage, gang-related or what," Ormsby said. "We are asking anybody that saw anything to please come forward."
Police said that the surviving victim's friends who showed up at hospital to check on him Thursday night were Hells Angels members, they but didn't say whether that victim or the man found fatally shot in the Ford Explorer were also club members.
The incident comes on the heels of another shooting in the city. On Tuesday, two men were shot after an argument around 5:20 a.m. outside a home in the 200 block of Cooper Way.
Police said there had been a dispute among four men earlier and that when two suspects returned to Cooper Way, the argument escalated and shots were fired. Information on what the men were arguing about has not been released.
Both victims were taken to hospitals. One had wounds that were not life-threatening and the other was in serious condition, police said. No one has been arrested in that shooting, but investigators were working to locate the two suspects, who are known to them, police said.
Three days earlier, on May 17 about 12:40 a.m., two men were shot about 12:41 a.m. -- one multiple times, in the 25000 block of Verona Avenue, south of West Tennyson Road.
A few hours later, at 3:28 a.m., another man was shot at least one time in the 22000 block of South Garden Avenue near A Street by a suspect who fired multiple rounds at a nearby apartment.
Later that day, at 9:44 p.m., a man was shot as he walked northbound on Foothill Boulevard near Russell Way.
All four male of the shooting victims on May 17 were expected to live.
Police would not say if those incidents were gang-related. No one involved in the shootings was cooperating with police.
Anyone with information about any of the cases is asked to call police at 510-293-7034 or 510-293-7000.
Contact Natalie Neysa Alund at 510-293-2469. Follow her at Twitter.com/nataliealund.