Fairfax police Sgt. Stuart Baker said 39 vehicles were vandalized between 10 p.m. and 11:30 p.m. Friday on Pine and Cascade drives, Laurel and Forrest avenues and Creek Road and Blueberry Lane.
Baker said police have identified a person of interest in the case.
The first tire slashing was reported at 10:18 p.m. Friday on Pine Drive, according to the Police Department's crime log. Fairfax police received calls about the slashed tires as late as noon Saturday.
Someone wearing a black jacket, blue jeans and sneakers was seen in the area, according to the police log. At about 3 a.m. Saturday, two people were seen slashing tires on eastbound Sir Francis Drake Boulevard.
One suspect was wearing a black hoodie and the other wore a gray hat, according to the reporting party.
San Anselmo police Detective Julie Gorwood said 12 cars had their tires slashed Friday night and early Saturday morning on Forrest Avenue, Humboldt Avenue and Foothill Road near the Fairfax border.
Gorwood said extra patrols were in the area Saturday and Sunday night and that both police departments are investigating the vandalism.
In February, 70 vehicles were vandalized in the same area over a 10-day period. The cars were parked on streets and in driveways.