OAKLAND -- Four people were wounded and one person was killed in four separate incidents of gun violence Saturday night and Sunday, police said.

The first incident took place at 10:15 p.m. Saturday in the 1600 block of 36th Avenue., said police spokeswoman Johnna Watson. During that incident, a man who was pistol whipped and taken to a hospital to be treated for non-life threatening injuries.

In the first Sunday incident, officers were called about 12:10 a.m. to the 7800 block of Ney Street after someone told 911 dispatchers there was a man who had been shot while standing in the street. The man was taken to a hospital in stable condition, Watson said.

At 1:52 p.m., a man in his 50s was shot multiple times in the 1400 block of Peralta Street, Watson said. He was also taken to a hospital and his condition was not known Sunday night.

In the most recent Sunday incident, officers responded at 3:40 to a housing complex on the 6600 block of Lion Way for reports of shots being fired, said Watson. When officers arrived, they found a 15-year-old girl fatally shot and a 14-year-old boy suffering from a non-life-threatening gunshot wound. He was taken to a hospital, Watson said. Both of the victims are from Oakland.

Authorities didn't report any arrests or motives for the violence. No further information was available about the victims.

Police and Crime Stoppers of Oakland are offering up to $5,000 in reward money for information about the cases. Anyone with information can call police at 510-238-3326.

Contact Natalie Neysa Alund at 510-293-2469. Follow her at Twitter.com/nataliealund. Contact Joshua Melvin at 650-348-4335. Follow him at Twitter.com/melvinreport.