The sheriff's office says it began after deputies found a man shot near Lancaster Circle in Bay Point around 1:30 a.m.
Deputies were alerted to a potential suspect in that case inside a nearby apartment.
People in the area of Chadwick Lane, Lancaster Circle and Lancaster Lane were told by the Contra Costa County Sheriff's Office early Saturday morning to go inside, close and lock all windows and doors, and not to call 911 unless they need to report a life-threatening emergency, while officers negotiated a surrender.
The suspect was finally taken into custody and the lockdown lifted just after 10:30 a.m.
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