A car and a van have been torched at Merriman Court in Ballymagroarty.
At around 1am on Monday (July 28), a youth was seen pouring flammable over three vehicles. There was minor damage to two of them. At this stage, a motive has not been established.
The youth was wearing a white hooded top and police at Strand Road are keen to hear from anyone who can help identify him. Information can be given on the police non-emergency number 101.
Alternatively, it can be provided to the Crimestoppers charity anonymously on 0800 555 111.