Officers have released an appeal for witnesses to the incident, about which they provided no extra information.
It happened on the North Plantation outside of Folies Nightclub during the early hours of Saturday 29 February.
Anyone who saw what happened is being asked to get in touch with PC 145 Kershaw on 725111. If they want to provide their information anonymously, they can call Crimestoppers on 0800 555 111.
Pictured top: The “incident” between a group of men happened outside of Folies Nightclub.