A stadium in Brazil that was due to host athletics at the 2016 Olympics has been closed indefinitely because of structural problems with its roof, BBC News reported.

The Joao Havelange stadium in Rio de Janeiro was built only six years ago.

It was also being used as the main football venue in Rio, while the city's Maracana stadium is being renovated for next year's World Cup.

It is an embarrassment for Brazil as it prepares for its two huge sporting events.

The authorities have also acknowledged delays in work on the Maracana and a funding problem at another stadium, which is set to host the opening match at the World Cup.