MOSCOW - Olympics discus silver medalist Daria Pishchalnikova is set to be stripped of her London 2012 medal after the Russian received a 10-year ban for a second doping violation on Tuesday. Samples provided by the 2006 European champion on May 20 last year in out-of-competition testing contained the banned substance oxandrolone, the Russian athletics federation announced. The results of the 27-year-old athlete, who was already banned for two years shortly before the 2008 Beijing Olympics, were cancelled from May 20, 2012 till November 2, 2012, the federation statement said. Pishchalnikova is one of a number of high-profile Russian athletes to be banned for doping in recent months as the sports authorities seek to show they have a strong anti-drugs line. –AFP