The victim has been named as Mark Ponisi.
The 53-year-old’s body was found in the living room of a property at London Road off Ravenhill Avenue shortly before 10 am on Saturday.
A 25-year-old man and a 26-year-old woman were arrested at the scene.
Police said the victim appeared to have sustained a number of injuries to his head and face.
A post-mortem examination will be carried out to establish the exact cause of death.
Detective Chief Inspector Geoff Boyce said: “Police and paramedics were called to an address in the London Road area shortly before 10 am on Saturday morning.
“A 53 year old man was located in the living room of the property however he was pronounced dead a short time later.
“The victim appeared to have sustained a number of injuries to his head and face however a post mortem examination will be carried out to establish the exact cause of death.
“A 25 year old man and a 26 year old woman were arrested at the scene on suspicion of murder.
“They remain in custody this afternoon assisting us with our enquiries.
“I am appealing for witnesses, or anyone who may have information about this crime, to get in touch with the investigation team by calling 101, quoting reference 347 of 20/01/18.”
“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.”