Five Russian walkers, including three Olympic champions, were banned for doping last month. Five world championship gold medals from 2009 and 2011 look set to be re-awarded.
Russian anti-doping agency head Nikita Kamaev says the walkers' biological data shows "the systematic nature of the offences" in terms of the "methods" and "approaches" used.
Kamaev said further bans could follow but that the case was complex, adding that "the Armstrong case took more than 2 1/2 years. Our case is no simpler."
Armstrong was banned for life in 2012 for doping offences and stripped of his seven Tour de France wins.Suggest a correction