An jock has died portion swimming during a triathlon successful Swansea, organisers person said.
Activity Wales Events confirmed the decease with "heavy hearts" and offered condolences to the athlete's family.
The organisers besides paid tribute to the efforts of archetypal responders, including volunteers, astatine the event.
Police, Wales Ambulance Service and St John Ambulance were among those who tried to assistance connected Sunday.
"We would similar to convey the unthinkable efforts of the aquatics information team, St John's, Ambulance, the accelerated effect team, the police, volunteers and members of the nationalist progressive astatine the scene," said Activity Wales Events successful a Facebook post.
The Welsh Ambulance Service said it was called astatine astir 09:15 BST to a aesculapian emergency.
"We sent a accelerated effect vehicle, an exigency ambulance, and the exigency aesculapian retrieval and transportation service.
"We were besides supported by St John's Ambulance."
South Wales Police has declined to comment.