Australia are refusing to move their athletes into the Rio Olympic Village because of concerns about the state of their accommodation.
Problems include "blocked toilets, leaking pipes and exposed wiring", according to team boss Kitty Chiller.
Chiller said she had raised concerns with local event organisers and the International Olympic Committee, and was "pushing hard for a solution".
Australian staff are in nearby hotels with the first athletes due on Monday.
Alternative accommodation for team members arriving over the next three days has been arranged.
The $1.5bn (£1.14bn) 31-building village has tennis courts, football pitches, seven swimming pools and will house 18,000 athletes and officials at the height of the Games, which start on 5 August, less than two weeks away.
Chiller, the head of Australia's Olympic delegation, said extra maintenance staff and more than 1,000 cleaners have been engaged to fix the problems but the faults, particularly the plumbing issues, have not been resolved.
She said in a statement on the Australian Olympic website: "Due to a variety of problems in the Village, including gas, electricity and plumbing, I have decided that no Australian team member will move into our allocated building.
"Problems include blocked toilets, leaking pipes, exposed wiring, darkened stairwells where no lighting has been installed and dirty floors in need of a massive clean."
Organisers have conceded there have been "teething troubles" and promised that crews would be "working 24 hours a day until the issues are resolved".
But Rio Mayor Eduardo Paes responded to Australian criticism by saying the Village is "more beautiful" than Sydney for the 2000 Games and that he was about to put "a kangaroo jumping outside" to "make them feel at home".