The International Olympic Committee has launched an inquiry into 28 Russians suspected of tampering with doping samples at the 2014 Sochi Winter Games in a new blow to Russia's efforts to redeem its name.IOC has also ordered new testing of all samples from Russians at Sochi, the 2010 Vancouver Winter Games and the 2012 London Olympics. The IOC said disciplinary proceedings against the 28 were ordered following McLaren's latest report for the World Anti-Doping Agency released on December 9.McLaren has accused Russia of "state sponsored" doping, using the intelligence services to organise the swapping of samples at Sochi. Twenty-seven Russian athletes have already been sanctioned by the IOC as a result of re-testing of some samples from the 2008 Beijing Games and London.