Vandals damaged a car parked at Morrisons supermarket in Oakley Road, Corby.
The incident happened on Tuesday, 29 October, between 8.30pm and 9pm.
A police spokesman said: “Three boys were seen in the area around the time of the incident. They were white and aged 15 to 16. One of the boys was wearing a grey and white hooded body-warmer and one was on a pedal bike. The other two were on foot.”
Anyone who saw the blue Vauxhall Corsa being damaged is asked to call the police on 101 or Crimestoppers on 0800 555 111.