A teenager has drowned in a reservoir, police said.
Emergency services were called to the 35ft deep reservoir in Creggan, Londonderry, where police divers recovered the body of the man in his late teens.
Police are not treating the death as suspicious.
Paddy Wilson, from Foyle Search and Rescue, said he believed some young people had been having a party around the reservoir and the victim had tried to swim to a floating platform. He appealed for people to take care.
"His mother and father and the rest of the family were there last night, it's such a sad, tragic thing for anybody to be told," he said.
"Last summer we had a similar tragedy, when a young man from Derry drowned in Rathmullan, and it seems as if we get calls like this in the summer."
Another teenager had been rescued from the reservoir overnight.