A 13-year-old girl has been arrested on suspicion of conspiracy to commit criminal damage in Hastings.
Police received nine reports of cars being damaged overnight between Sunday June 29 and Monday June 30.
Several had their windows smashed.
The vehicles were parked in Canute Road, Moscow Road, Broadlands, Saxon Road, Harold Road, Brackendale and Winchelsea Road.
The arrested teenager, who is from Hastings, has been bailed until August 6 while enquiries continue.
Anyone with information is asked to phone Sussex Police on 101 or email firstname.lastname@example.org, quoting serial 4714 007 3518.