Murder inquiry opened after 21-year-old man stabbed to death in Belfast
Four men are currently in custody in connection with the incident.
Detectives in Northern Ireland have officially launched a murder inquiry following the the death of a 21-year-old man who was injured in a serious incident in Belfast on Saturday morning (27 April).
The victim sustained stab wounds during an incident at a house in the Cairn Walk area of Crumlin which was reported to the PSNI at 2.50am.
Police officers responded, along with the Northern Ireland Ambulance Service, and the man was taken to hospital for treatment.
Detective Inspector Michelle Griffin confirmed that the man subsequently passed away on Sunday morning as a result of his injuries.
"Four men aged 19, 24, 25 and 29 are in custody in connection with the incident and are assisting us with our enquiries.
"I am appealing to anyone who was in the Cairn Walk area at around 2:50am on Saturday morning and has information which may assist our investigation to contact detectives by calling the non-emergency number 101, quoting reference number 141 of 27/04/19."
If calling from outside of Northern Ireland, the number is 0044 28 9065 0222.
Alternatively, people can contact the anonymous Crimestoppers line on 0800 555 111.