Swastikas drawn in blue chalk were found on the windows of 14 vehicles in Bethpage Wednesday and Tuesday, Nassau police said.
The graffiti are being treated as bias crimes by Second Precinct detectives, who are asking the public for help in finding those responsible.
The swastikas were drawn on the driver's side windows, scrawled between 9 p.m. Tuesday and 6 a.m. Wednesday, detectives said.
The targeted vehicles were parked in Bethpage on Park Lane, Whaley Avenue, Columbia Street, Lowell Street, Irving Street, Rose Street, Essen Place and Roosevelt Drive, police said.
Anyone with information about the incidents is asked to contact Nassau County Crime Stoppers at 800-244-TIPS.