Moscow: The Russian anti-doping agency Rusada says the Iaaf is demanding two Russian walkers be stripped of medals from the London 2012 Olympics.

World athletics governing body IAAF said on Wednesday it has lodged an appeal with the Court of Arbitration for Sport against doping bans handed by Rusada to six Russian athletes earlier this year, arguing that the Rusada decision wrongly let some results stand.

Rusada confirms in a statement that a key focus is that “the Iaaf did not agree with our decision to leave in force” results for Sergei Kirdyapkin and Olga Kaniskina at the 2012 Olympics.

Kirdyapkin won gold in the men’s 50-kilometre event, while Kaniskina was the silver medallist in the women’s 20-kilometre race.