South Bay law enforcement officers on Friday night began increasing patrols to keep any Cinco de Mayo weekend festivities from getting out of control.
In San Jose, officers began making their rounds in the downtown area. The Santa Clara Sheriff's Office also will have its gang task force out during the weekend.
Sources tell NBC Bay Area certain deputies will be looking for parole or probation violators as they are targeted as possible troublemakers this weekend.
Previous Cinco de Mayo celebrations in the area gave way to violence and vandalism.
George Sanchez, owns Chacho's Restaurant in downtown San Jose, said he has seen the good and the bad with Cinco de Mayo celebrations.
Sanchez said he is glad police are looking out for drunk drivers and anyone who gets out of hand.