Of the 28 athletes that have tested positive, none are competing at the IAAF World Championships in Beijing next week and many are retired.
Twenty-eight athletes from the 2005 and 2007 IAAF World Championships have returned 32 “adverse findings” after re-testing of anti-doping samples by the International Association of Athletics Federation, the governing body announced on Tuesday.
The IAAF has not released the names of the athletes due to the legal process.
None of the athletes with suspicious test results will be competing at this month's IAAF World Championships in Beijing. Many of the athletes are retired. A few remaining active athletes have been provisionally suspended by the IAAF.
At the 2005 IAAF World Championships in Helsinki, the United States won 25 medals. Russia had the second most with 18. The United States also topped the medal table at the 2007 IAAF World Championships with 26 medals with Russia (14) and Kenya (13) behind.
- Christopher Chavez