Detectives are appealing for information and witnesses following a serious assault in Derry in the early hours of this morning.
City centre CCTV operators picked up an ongoing altercation between two men in the Butcher Street area just after 2.25am.
Police immediately attended and found a 17-year-old male unconscious on the ground.
The other person involved had left the scene.
At this time, the injured man remains in hospital, having sustained a potentially life-threatening head injury.
Police say they know that a number of people were in the area at the time and are appealing to anyone who witnessed this shocking incident to come forward.
The contact number is 101 or a report can be submitted anonymously via Crimestoppers.
