The PSI are appealing for witnesses to an attack in the North that has left a teenage boy with head injuries.

The 18-year-old sustained a gash in his skull after he was reportedly assaulted on the Main Street of Castlewellan in the early hours of this morning.

A 30-year-old man has been arrested on suspicion of Gross Bodily Harm.

Detectives want to hear from anyone who saw the injured teenager in the street.