Ten parked cars were attacked by graffiti vandals and daubed with silver paint.
Nine of the cars, all left in Prestonville Road, Brighton, were daubed with the tag BN.
Another, parked in Russell Crescent, had silver paint sprayed on its windows and number plates.
The vandals struck overnight and their handiwork was discovered today.
A spokeswoman for Brighton and Hove police said: "We are researching the tag to find out if it is a local tagger. If we catch people, they will be prosecuted."
Anybody with information should contact Detective Sergeant Muddy Waters at Brighton police station on 0845 6070999.
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