An object has been thrown from a bridge in Brixworth on Saturday.
Police believe the object was either a brick or stones, thrown from the bridge on the A508 between Brixworth Country Park and the main road to Brixworth. It happened at about 5.45pm.
A white Nissan Micra being driven under the bridge was hit, causing damage to the windscreen.
The victim believes that objects were being thrown by a group of children who were running over the bridge, and that one of them was wearing a red top.
Witnesses, or anyone with information, are asked to call Northamptonshire Police on 101. Alternatively, they can call Crimestoppers on 0800 555111.