A woman in her fifties sustained a head injury and rushed to hospital after being assaulted outside Bracknell Leisure Centre.
The incident occurred at around 10:20pm on Saturday, November 12 on Bagshot Road.
Thames Valley Police have released images of three women that officers believe 'may have vital information' about the attack.
The victim was reportedly pushed by another woman causing the her to fall backwards onto the concrete.
Investigating officer PC Sarah Newman, based at Loddon Valley police station, said: “We would like to appeal to anybody who recognises the women in this image to please get in touch as they may have vital information about this incident.
“If you know who one or any of them may be, or if one of them is you, please get in touch by calling 101 or making a report online, quoting reference 43220511102.
“Alternatively, if you wish to remain anonymous, please contact the independent charity Crimestoppers on 0800 555 111 or online.”
The woman was rushed to hospital following the incident and has since been discharged.
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