Kensington & Chelsea Police said objects were thrown at officers on the night of June 25-26 when they arrived in Notting Hill, London, to clear an unlicensed music event.
Footage shared on social media showed police present in the area and advancing down a street to the sound of shouting.
Police said: “Violence will not be tolerated & units are responding appropriately. This gathering is illegal & we ask anyone in attendance to leave.”
Cressida Dick, Commissioner of the Metropolitan Police, described the events as “utterly unacceptable”, according to the BBC. Credit: @lulabellaa via Storyful