The deaths of three construction workers at a Brazilian World Cup stadium mean the venue may now be completed up to two months late.
FIFA is expecting a delay of 45 to 60 days after a crane hoisting a 500-tonne structure collapsed, causing damage to the outer walls of the venue and a giant LED screen.

Football's world governing body had originally set a December 31 deadline for the completion of all stadiums for next summer's tournament.

The delay will increase existing worries over whether Brazil can get all its building work done in time for the June 12 kick-off.

Six stadiums have already been declared ready but there are concerns the venues in Cuiaba, Manaus and Curitiba may not meet the deadline.

Stadium bosses at Sao Paulo's Arena Corinthians said the "structure of the grandstand was not compromised" in the incident and that work on the 70,000-seat venue will resume on Monday, after a three-day period of mourning.

Andres Sanchez, operations director at the stadium, which is due to host the World Cup opener, said the three workers were crushed to death.

They workers, Ronaldo Oliveira dos Santos, 44, and Fabio Luiz Pereira, 42, were reportedly inside their truck when it was hit by the falling structure.

Most of the 1,700 workers were on a lunch break when the incident took place.

In a statement, Corinthians said it was the 38th time the crane had performed the procedure and that a similar structure had been successfully installed a week ago.

Investigators are looking into the reason for the collapse.

FIFA said the "safety of workers is the top priority" of World Cup organisers, while the organisation's' president, Sepp Blatter, said he was "deeply saddened by the tragic death of workers".

"Our heartfelt condolences are with the families," he said

The incident is not the first to hit the country's World Cup preparations however.

One worker died last year during construction of a stadium in the capital, Brasilia, and one was killed at the Manaus stadium last March.