Thames Valley Police is appealing for witnesses following an assault in Newport Pagnell.
The incident occurred at around 9pm on Saturday 14 May near Newport Pagnell Medical Centre.
A group of three women and two men were walking towards the back of the centre when they noticed a group of 16-18 people aged around 20, also walking in that direction.
One of the large group instigated an attack on the group of five, this attack has focused on the men in the group but as one of the women tried to intervene she was also struck.
One of the women called her Dad to come and collect her but when he turned up with some of his friends they were also attacked.
One offender is described as around 5ft 5 ins tall, of average build with black hair.
He was wearing a black t-shirt with a pink logo on the back and black Adidas tracksuit bottoms.
Another offender is described as around 5ft 9 ins tall, of slim build, had short brown hair and a slight moustache.
He was wearing a white t-shirt, grey tracksuit bottoms and white trainers.
Investigating officer, PC Jordan Cullum, based at Milton Keynes police station, said: “I would like to appeal to anybody who may have been in this area during this time and may have dash-cam footage, CCTV or may have witnessed anything to please get in touch.
“You can contact us by either making a report online or by calling 101 quoting reference number 43220209387.
“Alternatively, for 100% anonymity, you can also call the independent charity Crimestoppers on 0800 555 111.”