>> This is the man plunging world athletics into its worst ever drug scandal. Gregory Rodchenkov seen at work in 2014 when he was head of Russia's anti-doping lab. Now he says he was at the heart of a massive system of cheating. In an interview with the New York Times, he claims he helped destroy as many as 100 suspect urine samples.
According to Rodchenkov, members of Russia's intelligence services replaced the tainted samples with clean urine collected months earlier. He says at least 15 Olympic medal winners were involved. Reuters Sports Editor, Ian Axon.>> Obviously there's no concrete evidence, so it's difficult to say that they're 100% credible. But I think the sheer weight of allegations that keep coming out about Russia and about doping suggests there probably is some truth behind it.
But obviously, until we have concrete evidence, then it's very difficult to prove.>> Thursday was already a dark day for athletics. Running powerhouse Kenya ruled to be in breach of doping regulations and facing possible suspension. Now, the question is whether Russia, already suspended from world competition, can go to the Rio Olympics.
World athletics governing body, the IAAF, set to decide on that in June.>> And at the moment, I think it's likely but for the first time yesterday I wondered if there might now be a chance that they won't go. I think there's a lot of political pressure for them to be there, I think the IOC want Russian athletes to be there, they want Russia on site.
Moscow calls the New York Times report nonsense. But the detail and the source of the latest allegations, will make them hard to dismiss.