A grandmother was left with a black eye after she appears to have been punched by a police officer.
Footage shows Colleen Murphy fall to the ground as she was hit while her son was being arrested for drunk and disorderly behaviour.
Greater Manchester Police (GMP) said officers had been called a report of a “disturbance” on Union Street in Oldham after 9pm last Saturday.
Ms Murphy’s son had gone inside the supermarket with his sister, Danielle Willisford, while his cousin and mother had been refused entry.
Ms Willisford told the Manchester Evening News: “Me and my brother came out with a few beers and something for the kids to eat and we were getting told what had gone on – they couldn’t go in and anyway the police turned up.
“They come over and my brother said ‘right we’ve sorted the situation you don’t need to be here’.
“They started saying we’re all barred, my brother said ‘what do you mean I’m barred? I’ve just come out of Sainsbury’s and we weren’t told we were barred. We did nothing wrong – just went shopping’.
“My brother goes to the security guard ‘I’m not barred, am I?’ and there were three policemen: one woman and two men.
“He stepped into Sainsbury’s and then the policeman in the yellow top said ‘you are barred, I just told you, you are barred’ and then started shouting and my brother just said ‘will you please get out of my face I’ve done nothing wrong’.
“Anyway, he grabbed him and flung him on to the floor and the full video is what happened after that.”
In a video shared on social media, police can be seen pushing people away as they arrest Ms Murphy’s son outside Sainsbury’s.
Ms Willisford told the paper: “So my mum, as he has punched my brother in the head, has walked over and said ‘you’re hurting him, stop hurting my son’. She’s a touchy-feely person and she was under the influence of alcohol. The way he hit her, he could have killed her.
“She’s got a massive lump on her head and bruise on the side of her face. She’s 50 years old. He’s flung her, for nothing. She went over and touched his head, she’s panicking, obviously, she shouldn’t have touched him.”
Her brother was fined for being drunk and disorderly.
GMP said the incident has been referred to its Professional Standards Department.
In a statement, a spokesperson said: “Greater Manchester Police are aware of a video circulating online which shows an altercation between officers and a member of the public whilst a man is being arrested.
“This incident took place after police were called just after 9pm on 7 August and responded to a report of a disturbance on Union Street, Oldham.
“A 31-year old-male was subsequently arrested for being drunk and disorderly. At the time of his arrest a crowd had gathered, and footage of the incident has been uploaded onto social media.
“The footage shows an altercation with members of the public attempting to intervene, while officers placed the man under arrest.
“The man received a fixed penalty notice (FPN) for being drunk and disorderly. There were no injuries reported.
“The incident has been referred to our Professional Standards Department, who will review the Body Worn Video of events leading up to the arrest, along with the footage posted.
“Enquiries are ongoing to identify those present, and we would encourage any bystanders to get in touch with us on 0161 856 9521, quoting log number 2985 of 07/08/21.”