Walker, 50, dies on top of Corn Du in Brecon Beacons
A 50-year-old man has collapsed and died on a mountain top in the Brecon Beacons.
He was accompanying a group of teenagers from Dorset on a walking expedition on Corn Du when the alarm was raised at 13:30 BST on Saturday.
Two mountain rescue teams, police and an air ambulance were alerted.
Penny Brockman of Central Beacons Mountain Rescue Team said rescuers reached the man within minutes but it was too late.
"Our team were providing support for a two-day mountain event and were on the scene within minutes," she explained.
"I'd like to pay tribute to the members of the public who were first on the scene and did everything they could to save the gentleman."
Ms Brockman said everyone involved had been left shocked and saddened by the incident, which she described as very rare.
"We would like to pass on our condolences to the gentleman's family," she said.
Corn Du, next to Pen y Fan, is the second highest peak in South Wales at 873m (2,864 ft).