A Jamaican athlete is the latest to fail a doping re-test. The runner is one of 31 competitors that were originally deemed clean, but failed after a re-test of their sample from the 2008 Beijing Games.

Following the biggest doping scandal in years, the International Olympic Committee ordered retesting of 2008 and 2012 Olympic samples where traces of drugs that were undetectable at the time can now show up under advanced techniques.

Jamaica won six gold, three silver and two bronze medals at the 2008 Olympics, all in athletics.   

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French newspaper - -The Gleaner -- identified runner was among 31 athletes from among a dozen countries whose retested A sample from Beijing had shown the presence of a banned substance. The runner cannot be named pending the outcome of the B sample test.

The re-analysis of samples was carried out at the request of the IOC, which is trying to crack down on doping ahead of the Rio Games in August.