Police are appealing for information following an assault in the Killultagh Park area of Glenavy during the early hours of Friday,
It was reported that sometime between midnight and 1am, an 18-year-old male had been assaulted by a number of other males outside a house in the area.
The male suffered a fractured jaw, fractured eye socket and a number of cuts and bruises as a result of the incident.
Three males aged 17 were arrested on suspicions of grievous bodily harm with intent.
Police would ask anyone who may have witnessed the assault or with any information to contact them in Lisburn Police Station on the non-emergency number 101.
Or if someone would prefer to provide information without giving their details, they can contact the independent charity Crimestoppers and speak to them anonymously on 0800 555 111.