A teenager has died after an attack at a nightclub on the first day of a holiday on the Greek island of Zante.
Jon Hiles had just finished college when he went on holiday
A friend of Jon Hiles, 18, from Cardiff, told how he had been punched in the face and fell from a stage.
The keen roller-hockey player suffered head injuries and died in hospital in Athens two days later, on the eve of his 19th birthday.
The Foreign Office said the death was being treated as manslaughter and it was in touch with local authorities.
Mr Hiles' parents Denzil and Peryn, his girlfriend Clare Ursell and close friend, Josh Ursell, were at his bedside when he died on Sunday.
Friends who were with Mr Hiles on the holiday have stayed on the island to help with the police investigation.
Jason Mordecai, 19, from Whitchurch, Cardiff said they had been dancing on stage when the assault happened at a club in Laganas.
"As we were there, this guy with an English accent walked onto the stage and started urinating" he said.
"He started urinating on Jon and he [Jon] asked this guy if he was all right and as he did, this guy punched him in the face and he fell 6ft onto the floor from the stage."
Mr Mordecai said the man had "just left and run off".
Mr Hiles, who was unconscious had been taken to hospital.
Jon Hiles had only just arrived on the holiday island
He added: "We are all trying to solve what happened. We owe it to Jon to at least look for this guy and we are walking the streets day and night with undercover police to look for him."
A spokesman at Laganas police station said the incident was "something serious."
He said: "We have the death of a British person and we are looking for who did this."
A Foreign Office spokeswoman said: "Next of kin have been informed and are receiving consular assistance."
Mr Hiles, from Llandaff North in Cardiff, had represented the Great Britain roller hockey team and had also played ice hockey for the Cardiff Devil's junior team.
Rhys Welsh, who plays for Mr Hiles' roller hockey club, Cardiff Capitals, said: "Jon was my best friend and a team-mate, if I wasn't playing hockey with him I was out with him somewhere else.
"I still don't want to accept the fact he's gone - just like everybody else. There was never a dull moment and he always made me laugh.
"Everywhere I look, I've got a funny story to tell with him in it."
Paul Hayes, director of coaching for the Cardiff Devils, said "It's so shocking when there's a loss of any young life. He was a talented sportsman and a nice guy."