The man was taken to hospital for treatment to his injuries.
Detective Sergeant Dane said: “We are working to establish the circumstances surrounding this incident.
“An altercation is believed to have occurred sometime between the evening of Saturday, 13 October and time of report to police at 12.50pm yesterday, Sunday, 14 October.
“I would ask anyone who noticed any suspicious activity in the area or anyone who has information that could assist police with their enquiries to contact detectives at Musgrave on the non-emergency number 101, quoting reference 710 14/10/18.
“Alternatively, information can also be provided to the independent charity Crimestoppers on 0800 555 111, which is 100% anonymous and gives people the power to speak up and stop crime.”