Police say a 34-year-old man was reportedly assaulted and then struck on the head with a hatchet in the Glenrosa Link in the Duncairn area at around 1.15 am.
He was taken to the Mater Hospital for treatment and is in a stable condition.
Police arrested two men, both aged 26.
They are currently being questioned at the PACE custody suite at Musgrave PSNI station.
Detectives are appealing for witnesses and can be contacted by calling 101, quoting reference 100 of 25/06/17.”
Alternatively information information can be given anonymously to Crimestoppers on freephone 0800 555 111.