A police officer has been jumped and kicked in a 'sickening' street attack after stopping to help an apparent assault victim.
Footage shows the officer being surrounded by several men including one with a baseball bat.
He is pinned on the ground and kicked by a man wearing blue trousers, reports the Mirror.
And is female colleague is pushed away when she tries to intervene.
The men were filmed swearing, shouting and filming on their phones, with one even dancing a jig and taking a selfie during the assault.
Both officers suffered minor injuries in the incident, in Frampton Park Road, Hackney, east London, at around 3.30pm on Wednesday, Scotland Yard said.
They had been flagged down by a member of the public who said they had been attacked and pointed them towards the suspects, a spokeswoman added.
A female officer is then seen telling the others to get back while her colleague continues attempting to detain the man on the ground.
Meanwhile one of the group appears to take a selfie on a mobile phone in front of the scene.
A Scotland Yard spokeswoman said two men, aged 20 and 38, have been arrested on suspicion of assaulting police.
They remain in custody in an east London police station.
The Metropolitan Police Federation, which represents rank-and-file officers, said attacks on officers seem to be increasing, adding: "Yet again this starkly shows the dangers @metpoliceuk face and the bravery they show each and every day keeping Londoners safe."
Chairman Ken Marsh said: "We are not society's punchbags. We have families we want to go home to at the end of every shift. But the dangers are stark. And seemingly escalating."
Mayor of London, Sadiq Khan, added: "I utterly condemn the disgraceful attack on two Metropolitan Police officers this afternoon.
"These brave officers were doing their duty and assisting the public. We owe them a debt of gratitude and I wish them a full and speedy recovery.
"Attacks on our police will not be tolerated. I urge anyone with information to come forward to ensure the perpetrators of this disgusting attack feel the full force of the law."
Home Secretary Priti Patel tweeted: "Sickening, shocking & disgraceful.
"My thoughts are with the outstanding @metpoliceuk officers who were subject to this disgusting violent attack."
Superintendent Martin Rolston, from the Met's Central East Command Unit, said: "This incident, which was captured on someone's mobile phone is truly shocking.
"My officers went to the assistance of a member of the public - who asked for their help - after stating that they had been assaulted.
"What happened next is a reminder of the risks our officers take whilst going about their duties.
"It is fortunate that their injuries are not more serious. There is no place for this level of violence on our streets.
"We are engaging with our community partners to discuss what happened and I hope that anyone who witnessed what happened comes forward and speaks with us."
In a post on Twitter, John Apter, chairman of the Police Federation of England and Wales, added: "Horrific, stomach churning scenes.
"Disgusting behaviour from those who attack the officers, those who film what's going on and those who do nothing.
"They are cowards, the lot of them.
"As for my colleagues, I stand with you and so do the the vast majority of the public."
