The second shooting, about 45 minutes later on Whalley Avenue, left one man dead and another wounded.
The Federal Bureau of Investigation joined state and local law enforcement in investigating four sniper shootings that left one man dead and another injured on Sunday.
A shooting at the Bay Fair BART station in San Leandro left one man dead and another injured on Saturday.
A key witness, whom Marion Sugee" Knight allegedly ran over in a hit-and-run incident that left one man dead and another injured, has refused to "snitch" on the music mogul during a preliminary hearing on Monday.
The reaction was triggered by an incident in the district of Lice, which left one man dead and several others wounded after security forces fired on protesters.
In June, an overcrowded house party in East New York, Brooklyn that was advertised on Facebook as "Freaky Friday" ended in a shooting that left one man dead and seven injured.
Police on Thursday arrested a rapper in connection with a shooting that left one man dead and three other people wounded shortly before a concert by rapper T.I. in Manhattan.
The melee left one man dead and at least 10 injured.
An explosion last Thursday left one man dead and more than two dozen wounded.
They gave up only because "there was nothing left," one man said.
Thursday's exchange left one man dead and Mr. Parks and another man seriously wounded, the police said.
