East Palo Alto Police Sgt. Dave Carson told KTVU there were a series of raids being staged on the homes of known gang members.

“Today we are running probation and parole sweeps, mainly focusing in on gang members, specifically Nortenos and Surenos ” he said. “The death of a three-month-old was the impetus for this and that is the reason why we are focused on these two gangs.”

“We are making it absolutely obvious and absolutely certain to everyone who lives in town and everyone who is a gang member, especially associated with those two gangs, that that sort of behavior is not going to be tolerated.”

Fabian Zaragoza, 17, has been charged as an adult with murder for the June 5 shooting that killed 3-month-old Izack Jesus Jimenez Garcia and wounded his parents, Ivonne Garcia Lopez and Oscar Jimenez, of Redwood City.

Zaragoza and another person are believed to have targeted the family after mistaking them for Sureno gang members who had assaulted Zaragoza in Redwood City on May 31.

In addition to murder, Zaragoza has been charged with two counts of attempted murder with the infliction of great bodily injury, a special circumstance of lying in wait and use of a firearm in the commission of the crimes.

Zaragoza, who is being held without bail, faces life in prison without the possibility of parole if convicted.