It’s believed the incident happened some time before 11pm, when members of the public found the victim on Liberty Road.
He is described as White, around 60 years old, 6ft tall and of a medium build with brown greying hair.
He was wearing a grey top and denim jeans.
Officers are trying to work out how he sustained these injuries.
Any witnesses or anyone who saw the victim prior to the incident are urged to contact police on 101.