Ronaldo de Assis Moreira, commonly known as Ronaldinho Gaúcho or simply Ronaldinho, is a Brazilian former professional footballer and ambassador for Barcelona. He played mostly as an attacking midfielder, but was also deployed as a forward or a winger.
The Victims were all staying at Ninho de Urubu, the training ground of Flamengo football club in Rio de Janeiro.
Three teenagers were also injured, one of them seriously. He has been taken to hospital for specialist treatment.
One young player said The Fire started in an air conditioner in his room.
"The air conditioner caught fire and I ran out," said Felipe Cardoso , a player with the under-17 side. "Thank God I managed to run and I'm still alive. "
Flamengo is one of Brazil's biggest and best-known clubs internationally. They play in the Campeonato Brasileiro Série A league where they finished in second place last season.
Club president Rodolfo Landim told reporters this was "without a doubt the worst tragedy this club has been through" in its 123-year history.
"It's a very sad day for Brazilian football," he tweeted.
Brazilian star forward and Paris Saint-Germain player, writing: "My sentiments. "
"on The Journey to realising their professional dreams".Who were The Victims ?
Senior club goalkeeper, Gabriel Batista , posted on Twitter about youth keeper Christian Esmerio.
"I had The Pleasure of knowing you," it reads. "God receive you with open arms".
One of the three injured, a 15-year-old boy, suffered severe burns.
Folha newspaper named him as Jonathan Cruz Ventura, who doctors say was burned on 30% of his body.What do we know so far?
According to the G1 news portal, The Fire began at 05:10 (07:10 GMT) and was extinguished by 07:30.
"The Place was completely overtaken by fire," he said.Bodies of victims are taken away from the training centre
It is unknown if there were smoke alarms present.Flamengo's pride in youth Academy
Analysis by Fernando Duarte , BBC Brasil
The Club owes a great chunk of this support to an incredible run of four Brazilian titles and a victorious Copa Libertadores campaign (The South American version of the Uefa Champions League) in the 1980s.
It has also produced arguably one of The Greatest all-time Brazilian Players - Arthur Antunes "Zico" Coimbra, a member of the 1982 World Cup squad that failed to win the title but won worldwide plaudits for its slick style.
As well as being one of Brazil's most successful football clubs, Flamengo also has basketball, rowing, swimming and volleyball teams.
The Ninho de Urubu ("Vulture's Nest" - so named because the symbol of The Club is a vulture) centre underwent a major expansion last year, with The Club spending 23m reais (£4. 8m, $6. 2m), Reuters news agency reports.
Real Madrid player Vinícius Júnior, who also played for Flamengo, tweeted a crying emoji, writing, "Such sad news. Pray for everyone. Strength strength, strength. "
Just over two years ago, Brazil's football world was rocked by disaster when.
Of the 77 people on board, 71 lost their Lives .