Mission / Shooting: Around 2 a.m. Sunday morning, two suspects near Alabama and 16th Street in the Mission fired shots at each other, hitting an uninvolved bystander in the process. The victim was treated for non-life threatening injuries and police arrested both suspects early Sunday morning. [BCN/SFAppeal, Mission Local]

Richmond / Multiple Shootings: Two separate shootings happened over the weekend in Richmond. The first occurred Friday night around 10:30 p.m. and left one man dead outside his home on Dunn Avenue. Around 7:30 a.m. Saturday morning, a man was found on the sidewalk of the 500 block of Harbour Way suffering from gunshot wounds. He was taken to the hospital with life-threatening injuries. Police had no information on the suspects of either shooting as of yesterday afternoon. These could be connected to what's being a called a newly erupting gang war that led to a SoMa murder two weeks ago. [CBS5]

Concord / Stabbing: The victim of a fatal stabbing that occurred outside of a Concord shopping center Sunday afternoon was identified as 20-year-old Richard Gilliam. Officers found Gilliam wounded in the parking lot of a shopping center at 5450 Ygnacio Valley Road. He was transported to a local hospital where he died from the injuries. The suspect was arrested after witnesses in the shopping center identified him. [CBS5]

San Bruno / Murder: An unresponsive male was found lying in the middle of Cypress Avenue in San Bruno on Sunday night, dead of traumatic injuries. A 24-year-old suspect has been arrested in connection with the possible homicide, but no further details have been released. [CBS]

Laurel Heights / Explosion: Neighbors on Palm Avenue were awoken to a big boom that some thought was a missile attack around 3:45 a.m. Sunday. It turned out to be an M-80 firework, and it shattered a window. [Examiner]