The Oakland Tribune ( http://bit.ly/ZIXOd8) reports the first fatal shooting took place around 2:30 p.m. when a 22-year-old Oakland man was shot to death in East Oakland.
The second fatal shooting was reported around 3 p.m. Friday when a 30-year-old Stockton man was found shot to death in the city's Glenview district.
Then around 4:15 p.m., a 20-year-old Oakland man was found shot in his car after the vehicle had come to a stop in a driveway of a home.
Around 8:15 p.m., a 17-year-old boy was shot and killed in East Oakland.
Officer Johnna Watson, a spokeswoman for the department, said the shootings involved what she termed as "several identified groups" involved in feuds. She did not identify any suspects.
Information from: The Oakland Tribune, http://www.oaklandtribune.com