Witnesses are being sought after a 17-year-old boy was assaulted in Wycliffe Road, Northampton.
The incident happened inside a property during a house party on Saturday, October 29, between 9.30pm and 10.45pm, when a group of males in balaclavas entered the address with one of them stabbing the boy with a knife.
They then made off in the direction of Wellingborough Road.
The boy was taken to hospital but thankfully did not sustain a life-threatening injury.
The party was attended by a large number of people and officers are appealing for any witnesses to come forward. The suspects are described as black males wearing dark clothing.
Witnesses or anyone who may have any information about this incident should call Northamptonshire Police on 101. Alternatively, you can call Crimestoppers anonymously on 0800 555111.