Three more vehicles were hit by projectiles near Los Lomas.
67 vehicles have been hit since February.
Two vehicles were hit on Highway 101 Monday night.
Another car was hit Friday, about 6 miles from Highway 101 and Highway 156.
The area where cars are being struck is now know as "Projectile Alley" because of the number of vehicles hit in the past year.
Drivers traveling in the area should keep their windows up, according to police.
Officials say drivers hit by a projectile should turn on their hazards, safely pull over and call 911.
There is a $15,000 reward available for information leading to an arrest of whoever is responsible for the attacks.