The Russian anti-doping agency says, six weightlifters, including former world and European junior champions have been banned for doping offenses. The agency says 2014 world junior champion Larisa Kobeleva received a four-year ban and Nadezhda Ovchinnikova, the European junior champion in 2014, was banned for two years.The other four weightlifters received sanctions of between four and eight years for doping offenses committed last year. It did not publish details of the offenses. There was also a four-year ban for Russian judo champion Pyotr Khachirov. The latest bans come less than two weeks before a key vote on whether to allow Russia's track and field team to compete at the Olympics.Meanwhile, Russia said, it is to start compulsory anti-doping classes in schools as part of a campaign to stamp out cheating in sport. The Sports Ministry said in Moscow, with the country furiously lobbying to overcome a ban on its athletes in time for the Rio Olympics, the lessons will be part of new measures. Russia has been hit by a series of doping scandals, still under investigation, that led the International Association of Athletics Federations to suspend Russia from international competition. The Ministry added that before the lessons start, there will be anti-doping classes for all higher education institutions for professionals in the fields of sport and medicine. This will be followed by additional training for doctors and medical personnel, coaches and employees of sport federations. Russia's anti-doping agency RUSADA will develop a special curriculum, based on World Anti-Doping Agency guidelines, for the 3,000 sports schools where the country's elite athletes train.