Two people have died and a number of people have been injured after an inner balcony in a nightclub in the South Korean city of Gwangju collapsed on early Saturday, the local fire department says.
Several athletes at the World Swimming Championships were slightly injured, news agency Yonhap reported.
Two New Zealand water polo players were slightly injured.
Two South Koreans were hospitalized in severe condition and later died, Yonhap reports.
The deceased were 38 and 27 years old and did not participate in the championships.
A balcony and staircase at the Coyote Ugly nightclub collapsed on Saturday (Friday, 5:29 pm GMT) at 2:29 am, with approximately 370 in it.
At that time, several water polo teams were in the club near the sportsman village.
A male diver and a female water polo player from the American team were slightly injured.
"This is a terrible tragedy," said Christopher Ramsey, head of the US Water Ball.
"Players of our men's and women's teams celebrated the women's world championship victory when the collapse occurred in a public association.
" The victims of the crash and their families are deeply affected.
"We were just dancing and the next minute we dropped five or six yards and then everyone ran out of the club," New Zealand water polo captain Matt Small told Radio Sport.
It was a business as usual and then it literally collapsed under our feet, "he added.
Australian water polo team members were also in the club.
" All Australian players are safe and can play without injury flee, "it says in a statement by Water Polo Australia.
" Fina deeply regrets the situation and sends her best wishes to all victims of this accident, "said a statement from the World Float .