The World Anti-Doping Agency has partially suspended its laboratory in Rio de Janeiro after the facility wrongly reported last year that a Brazilian beach volleyball player had tested positive.
A WADA statement says the laboratory had been suspended from conducting isotope ratio mass spectrometry (IRMS) testing on samples for a period of six months.
The move followed an investigation over a botched test on Pedro Solberg last year.
The Rio laboratory falsely reported the Brazilian beach volleyball player had tested positive for the male sex hormone testosterone but re-tests, by another laboratory in Germany, later proved he was clean.
The Rio laboratory is the only WADA-approved facility in Brazil, which is due to host the Fifa World Cup in 2014 and the Summer Olympics in 2016.