A 28-year-old man has suffered lacerations to his head after being attacked with a knife at a house in east Belfast.
The incident happened in the Lewis Court area in the early hours of Sunday.
According to police, the victim had to be taken to hospital for treatment, but his injuries are not believed to be life-threatening.
A 23-year-old man has been arrested.
Detectives are appealing for anyone who was in the Lewis Court or Killowen Street areas shortly after midnight to contact them on 101.