A 19-year-old woman has been stabbed in the neck and body at a house in Newtownards.
Police found the wounded teenager at a house in the Thomas Street area of the Co Down town at 12.45pm on Saturday.
The teenager was taken to hospital for treatment to her injuries, which are not thought to be life-threatening at this time.
Detective Sergeant Joy Fitzgerald said a man who fled from the property was arrested on suspicion of causing grievous bodily harm with intent.
He was detained by police a short distance away from the house.
Detectives are appealing to anyone who witnessed the incident, or who may have information which could help the investigation, to contact them at the Public Protection Unit in Newtownards on the non-emergency number 101.