Petaluma police arrested five people on suspicion of driving under the influence during a checkpoint and saturation patrols on Saturday night, a police sergeant said.
Additional police are now patrolling the Mission and violence prevention groups are also working around the clock to try to keep the crime at bay.
The company that created the Taser has a new high-tech tool for police, and the Bay Area Rapid Transit Police Department is the first in the nation to put it to use.
BART wants its officers to be more familiar with the beats they patrol. So officials have divided four zones into five and divided those even further.
In response to another weekend in which drunken brawls took center stage at a handful of downtown Walnut Creek bars, police are stepping up patrols in the area.
Passengers traveling on Bay Area Rapid Transit trains Friday might notice more police at downtown San Francisco stations
A high school in Martinez was the target of a threatening email sent earlier this week that has police increasing their presence on campus Friday.
The quiet plaza near the San Francisco Federal Building has been filled with crime and vandalism, a problem for many neighbors and residents in the area.
A new team of transit police officers started patrolling BART trains in 2011, walking through the cars to deter any potential terrorist attack.