A Russian athlete who placed fifth in the 50-kilometer walk at last year's London Olympics has been handed a lifetime ban by the IAAF for a second doping offense.
A South African track official had her lifetime ban lifted for her role in Caster Semenya's gender tests.
Sport's highest appeals court has upheld the lifetime doping ban for Jamaican sprinter and former world relay champion Steve Mullings.
Russian race walker Sergei Morozov has received a lifetime ban for a second doping offense.
Russia's Darya Pishchalnikova could be stripped of her silver medal in the discus at the London Olympics and face a lifetime ban following a positive doping test.
London-born sprinter Dwain Chambers was selected for the British Olympic team on Tuesday, three months after his lifetime ban from the games as a doping offender was overturned.
Jamaican sprinter Steve Mullings faces a lifetime ban after being found guilty of doping by a three-member disciplinary panel.
Marathon world record-holder Paula Radcliffe believes Britain's lifetime Olympic ban for doping offenders unfairly penalizes athletes.
Former hurdler Elmar Lichtenegger was banned for life Wednesday by the Austrian athletics federation for a second positive doping test since 2003.
Britain's last attempt to keep former doping offenders off its Olympic teams has failed, with sports' top court declaring the country's lifetime bans for drug cheats unlawful.