The Metropolitan Police has said it is investigating footage released on social media of an incident appearing to show an officer attacking a car.
The video claims to show a Met officer smashing the windscreen after the driver refuses to get out of the vehicle.
The incident took place in Camden, north London, at 17:00 BST on Friday.
The Met said the Directorate of Professional Standards (DPS) has launched an investigation.
It added that “as this matter is in its early stages, the officers have not been suspended or placed on restricted duties”.
It is not known what led up to the incident and no one was arrested. (BBC)