Berkeley police said they have increased patrols and investigations this week near Sacramento and Ashby streets in response to a number of recent shootings in the area.
One took place at about 5:40 p.m. Wednesday, injuring a 16-year-old boy who lives outside the city. Other shootings have injured other people, according to police.
The shootings appear to involve two groups shooting at each other. Police did not name the groups.
One of the shootings killed 22-year-old Alex Goodwin of Berkeley. Goodwin was shot to death last month near Burnett and Mabel streets.
City officials are offering a $15,000 reward for information leading to the arrest and conviction of the suspect or suspects who killed Goodwin.
A separate shooting Thursday evening killed 19-year-old Berkeley man Ignacio Francis Jr. Officers are still investigating whether Francis' death is related to the shootings near Sacramento and Ashby streets, police spokesman Officer Byron White said.
Police are asking residents to quickly report any disputes especially if a gun is involved.
Residents can also help in an investigation by providing surveillance video and additional information about damage to vehicles or buildings.
Police said they suspect only a few people are involved in the shooting spree.
Anyone with more information about the shooting that killed Alex Goodwin is urged to call the Police Department's homicide unit at (510) 981-5741.