The International Olympic Committee,IOC president Thomas Bach said that athletes and federations face life bans from the Olympics as he warned that doping has hit an unprecedented level of criminality. The IOC leader also heightened pressure on Russia to clear up allegations of interference in testing at its doping laboratory during the 2014 Sochi Winter Games.With 31 athletes from 12 countries already facing a ban from the Rio de Janeiro Olympics in August, Bach warned of tough sanctions, including against individual federations, if the accusations against Russia were proved. He said, there would be "zero tolerance" against athletes and their entourage.With international doping scandals mounting, the IOC announced yesterday that 31 athletes from the 2008 Beijing Olympics had failed tests after their samples were reexamined. The athletes are from 12 countries.