Footage has emerged of Met Police officers coming under attack after stopping a car in Tower Hamlets, London.
Video uploaded to YouTube by crime and policing website Police Hour shows police arguing with a large group of men, who become increasingly aggressive towards the officers.
The men surround the officers as they try to rescue two of their friends, who were being restrained by police.
Eventually a fight breaks out and one of the officers is pulled to the ground in the scuffle.
During the fight, the police use CS spray to keep the attackers back. Police backup later arrives to break up the brawl.
A Met Police spokesman said the fight broke out after police stopped a car in Shadwell, Tower Hamlets, around 5.30pm on Wednesday, 3 August.
The men began arguing with the officers, then "became more aggressive and subsequently assaulted" them, the spokesman said.
Four males were arrested on suspicion of various offences, including assault on police, obstruction and Public Order Act offences.
Two officers were treated for minor injuries, the spokesman added.