Constable Humphries said: “This incident was reported to police around 6 am on Saturday, September 23.
“We believe this man was walking in the Antrim Road area of the city with a male friend around 5.30 am when they were confronted by four males.
“During a subsequent assault, the 24 year old had part of his finger severed.
“Two of the four males involved were said to be in their late 20s and had local accents.
“One is described as wearing a l”ght blue jacket and the other, a dark blue jacket.
“We have no descriptions of the other two males, except that they were also local and younger – possibly aged around 20.
“Police are appealing for anyone who witnessed the incident early this morning to get in touch on the non-emergency number 101, quoting reference number 316 of 23/9/17.
“Alternatively, information can also be given anonymously through the independent charity Crimestoppers on 0800 555 111.”
It is understood the 24 year old male victim is currently being treated in hospital for the injury to his finger.