The International Association of Athletics Federations (IAAF) have announced that six athletes have been found guilty of doping during the 2005 World Championships in Helsinki.
Samples from the tournament were retested to show that Belarusian shot putter Nadzeya Ostapchuk, who was stripped of her Olympic gold medal from London 2012 for doping, compatriot hammer thrower Ivan Tsikhan and Russia's Ola Kuzenkova were guilty of taking performance-enhancing drugs.
Russia's Tatyana Kotova, Belarusian male hammer thrower Vadim Devyatovskiy and fellow countryman Andrei Mikhnevich were also caught doping.
"This retesting is just the latest example of the IAAF's firm resolve to expose cheating in our sport," BBC Sport quotes IAAF president Dick Pound as saying.
"The IAAF will continue to do everything in its power to ensure the credibility of competition, and where the rules have been broken, will systematically uncover the cheats."
Ostapchuk is serving a 12-month ban.
