An A-level student who died after suffering serious head injuries during a night out in Londonderry had planned to become a veterinary surgeon.
Caolan Page (19), from the village of Carrigans, Co Donegal, was discovered unconscious outside licensed premises in the city in the early hours of Saturday morning.
The St Columb's College pupil was taken to Altnagelvin Hospital in a critical condition but died from his injuries yesterday.
Detectives are currently investigating the circumstances of the fatal incident on Magazine Street where the teenager was discovered at 8.30am on Saturday.
There were no details about how his injuries were sustained and investigators are expected to examine CCTV footage in the city centre.
A PSNI spokesman said they were not treating the death as murder at this stage, and have appealed for witnesses to come forward.
The family and friends of Caolan, who was from the Upper Kildrum area of Carrigans - a 10-minute drive from Derry - were said to be shocked and devastated by his death.
It is understood the teenager had gone out with friends on Friday night and had become separated from them when he went to get a burger.
Foyle Assembly Member, Mark H Durkan, said Caolan had a wide circle of friends who were "extremely disturbed" by the news of his untimely death.
"There's a great sense of shock," the SDLP MLA said. "From what I can gather, he was a kind and caring young man, quiet and not particularly outgoing.
"He had a clear idea about where he wanted to go with his life, and it's so sad that has been cut short."
Anyone with information is asked to contact Strand Road police on 0845 600 8000 or anonymously at Crimestoppers on 0800 555 111.