The Minister of the Interior and the Police Union condemned a video showing an officer on the ground being punched and kicked.
The video circulated on social media shows an officer suffering from a man at Frampton Park Road in Hackney, north London.
Pretty Patel described the footage as “sick”, while the union said: “We are not bags of community punch.”
Two men, aged 20 and 38, were arrested on suspicion of assaulting the police.
Police said that the officers, a man and a woman, were slightly injured but did not need hospital treatment.
A member of the public, who allegedly was assaulted, arrested the police on Wednesday afternoon.
He said in a statement: “When an officer tried to speak with those involved, one of the men resisted and a conflict erupted. A number of other people got involved while the officer was on the ground.”
The footage appears to show the officer trying to restrain a man, but then they fell to the ground and the officer was fixed under it.
Passers-by began photographing and taking selfies while the officer and suspect were wrestling.
The officer attempted to move people away from the scene and was also injured before more officers arrived and arrested the two men currently being held.
Ken Marsh, head of the Metropolitan Police Union, said: “Once again this blatantly shows the stakes [officers] Their face and courage appear every day to keep the Londoners safe.
“We are not the perforated bags of society. We have families that we want to return to at the end of every shift, but the stakes are severe and seem to be escalating.”
Supt Martin Rolston said: “This incident, which was taken on someone’s mobile phone, is really shocking.
“Misty went to help one of the audience members – who asked for help – after they mentioned that they had been assaulted.
“What happened next is a reminder of the risks our officers assume in the performance of their duties.”
By BBC London Home Affairs correspondent Catherine Carpenter
The ocean says the context surrounding the incident in Hackney is still unclear, and officers have been responding to calls for help but we do not yet know how this led to a conflict on the ground.
I understand that the police in Hackney have already planned to meet with local community groups today, and now this incident and the tensions surrounding it seem to dominate the conversation.
The latest Ministry of Interior figures show that there were approximately 5,000 attacks on meteorological police officers and that just under half resulted in an injury.
But there was concern that the anti-police sentiment expressed during the recent “black life” demonstrations might see this number rise.
Home Minister Pretti Patel tweeted, “Satisfactory, shocking and shameful.
“My thoughts are with the prominent officers who have been subjected to this disgusting violent attack.”
London Mayor Sadiq Khan said: “I strongly condemn the shameful attack on the two capital police officers this afternoon.
“These brave officers were doing their duty and helping the public. We owe them a debt of gratitude.”