Thursday 2 June 2016 14:50, UK
A Jamaican athlete is reportedly among those who have failed a doping test after samples were re-examined from the 2008 Beijing Olympics.
The athlete has returned an adverse analytical finding for the A-sample and the result of the B-sample test is expected from the World Anti-Doping Agency (WADA) accredited laboratory in Lausanne within days, sources have told the Reuters news agency.
Jamaica Olympic Association president Michael Fennell has declined to comment, while Jamaica Athletics Administrative Association president Dr Warren Blake said his organisation had not been notified of any rule violation.
Jamaica won six gold, three silver and two bronze medals at the 2008 Olympics, all in athletics.
The International Olympic Committee (IOC) has ordered retesting of 2008 and 2012 Olympic samples where traces of drugs that were undetectable at the time now show up under advanced techniques.
The IOC said last month that 31 athletes from six different sports and 12 countries had tested positive in the retesting of 2008 samples and that it had launched disciplinary action against the athletes concerned in order to prevent them from competing in this year's Olympics in Rio.
Russia has already said 14 of its athletes were among the positive tests from 2008.
Meanwhile, a Turkish boxer has been provisionally suspended after his doping sample from the 2012 London Olympics came back positive in retesting - one of 23 positive retests from London.
The International Boxing Association (AIBA) revealed Adem Kilicci had tested positive for steroids. The fighter and the Turkish boxing federation have been notified of the findings and his suspension.
Kilici, who had qualified to box in the Games in Rio this year, lost in the quarter-finals of the middleweight division in London to gold medal winner Ryota Murata of Japan.
The AIBA says it is working with the WADA "to ensure that boxing is doping free".
Russian track cyclist Yekaterina Gnidenko has also been suspended by the International Cycling Union after failing a doping test on a sample taken shortly before London 2012, although it has not been confirmed that this is due to the retesting program.
Gnidenko, who tested positive for steroids, competed in the women's sprint and keirin at the 2012 Olympics without winning a medal, but she now faces being stripped of her silver medal from the European Championships later that year.
