In all three cases, the thief or thieves entered unlocked vehicles parked in driveways, and in one incident, entered a home through an unlocked door and stole an electronic device, according to police.
The crimes occurred near the intersection of Austin Avenue and Selby Lane, west of El Camino Real, police said.
"The Police Department continues to ask residents to be vigilant in protecting their property," the department said in an email alert sent out on Thursday — one of a number of such notices in recent months. "Please take the time to lock your vehicles and the doors to your home, especially overnight and when you are not at home," the notice said. "If you have an alarm system, please use it."
The crimes are the latest in a series of theft-related crimes in that area; the spate of crimes includes one or more incidents on Stockbridge Avenue.
In late October, police arrested two women over a two-day period on suspicion of burglary or attempted burglary and other crimes. But those incidents occurred outside the hard-hit Selby Lane area: one on Jennings Lane and the other on Isabella Avenue.