Police were pelted with projectiles as they tried to break-up an illegal block party in north London on Tuesday night.
Footage appeared to show scores of revelers running from the scene in Stamford Hill as officers from the Metropolitan Police’s Territorial Support Group marched into the 400-strong crowd.
The party began around 6pm. Traffic was blocked at the junction of Stamford Hill and Lynmouth Road and sound systems were set up on the street.
Police said they had earlier tried to get organisers to call off the event and at 7.45pm Hackney police tweeted that the party in Malvern House “is not going ahead” and asked people not to attend the area.
Tweets in reply were dismissive of the claimed cancellation, with one person replying that the event looked “pretty slamming when I went past a few minutes back”.
Some officers suffered minor injuries as the crowd threw bottles and other objects, police said, adding that three police vans were also damaged.
Similar chaos erupted in Hyde Park on Tuesday night after a water fight turned violent leading to three people - including a police officer - being stabbed.
Officers remained in Stamford Hill until the crowds left the scene. No arrests were made.
Hackney police on Wednesday called on members of the public to submit any footage they had of the disorder.