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Less than five months before the start of the Pyeongchang Games, the group said the International Olympic Committee's (IOC) "refusal to hold Russia accountable for one of the biggest scandals in sports history... imperils clean athletes and the future of the Olympic movement", the BBC reported.

The Nados, which includes the UK and U.S. anti-doping agencies, said the country must be punished "for proven corruption of the Sochi 2014 Games and continuing failure in its obligations to clean sport".

Read alsoRussians no longer dispute Olympic doping operation - NYTThey also warned they had "serious doubts" that Pyeongchang 2018, which takes place from 9-25 February, would be clean.

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Last year, an independent report commissioned by the World Anti-Doping Agency (Wada) found evidence of state-sponsored doping in Russia, for which the IOC is yet to decide on sanctions.

Two commissions set up in December have still not concluded, with speculation that Russia could face a heavy fine, escaping a ban.