A Russian doctor has revealed how he was involved in an extensive doping plot used to fuel Russian athletes at the 2014 Sochi Games.
Dr Grigory Rodchenkov told the New York Times how, under direct orders from the Sports Minister and the help of secret service agents, bottles of urine from Russian athletes were smuggled out of a lab in Sochi and replaced with clean samples.
Rodchenkov, who was the head of the nation's anti-doping laboratory at the time, has since fled Russia after his two work colleagues died under mysterious circumstances within two weeks of each other in February.
He explained how, with the help of his staff and members from the intelligence service, they passed bottles of urine through a hand-sized hole in the wall to a shadow laboratory set-up in a storage room adjacent to where the samples were stored.
These supposedly tamper-proof bottles were opened and the contents replaced with clean urine from the same athlete collected months earlier.
Rodchenkov knew the samples would test positive as he himself was responsible for developing a three-drug cocktail of banned substances that was mixed with liquor and given to dozens of Russian athletes.
Russia would top the medals table at the event, winning 13 gold medals and 33 in total.
In retaliation to these damning allegations, the International Olympic Committee has ordered further inquiries.
"These allegations are very detailed and very worrying and we ask the World Anti-Doping Agency to investigate immediately," said a statement.
"The laboratory in Sochi was fully accredited by Wada. The IOC also relied on the work of its own international experts in the laboratory – the Games group.
"Based on the findings of a Wada inquiry the IOC will not hesitate to act with its usual policy of zero tolerance for doping and defending the clean athletes."
Russian athletes are already banned from international competition by the International Association of Athletics Federations after a WADA report alleged that there was ‘state-sponsored’ doping throughout the nation.