Graffiti was sprayed on three vehicles in Banbury.
All three were parked in Woodfield, Ruscote, between 11pm and 11.20pm on Wednesday.
Pc Paul Townley said: “This type of criminal damage is a problem and causes inconvenience to the local residents.
“The words, Benzo and Loz were sprayed on the cars and I would like to encourage anyone who may have witnessed this happening or have any information to help the police with their inquiries to get in touch.”
Anyone with information should contact police on 08458 505505 or Crimestoppers on 0800 555111.
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