At least three people have been killed in a partial collapse at the Arena Corinthians in Sao Paulo, the stadium which is planned to host the World Cup opener.
The latest blow to the tournament due to start in seven months time and plagued by long awaited delays, and extra costs came as workers were installing the last piece of metal to the grandstand at the Itaquero Stadium.
According to the local media it is understood that the ground gave way and the 114ft crane considered to be the largest in Brazil collapsed into parts of the stand and as a result claiming three casualties.
The head of the fire department, Mauro Lopes, said that more people could have been killed if it wasn't for construction workers heading off for their lunch when they did.
Odebrecht, the construction firm responsible for the development of the area had originally said the stadium was 94% complete before the tragedy announced in a press conference that three workers were killed and that they would work around the clock to ensure that the venue is completed before the 31st December deadline issued by FIFA.
Corinthians, the club moving into the stadium once the delayed developed is finished has announced a seven day mourning period in the wake of the tragedy.
FIFA boss Sepp Blatter took to twitter describing himself as "deeply saddened by the tragic deaths of workers in the Corinthians Stadium today."
The accident is the latest blow to Brazil's efforts to have all of the 12 stadiums needed to host the competition successfully completed by December.
Work at the Amazonia Arena in Manaus has been recently beset by tropical rain whilst there has also been deaths during the in the construction of the National Stadium in the nations capital Brasilia.
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