Ramzi won Bahrain's first ever Olympic gold medal in track and field after the Moroccan-born runner won the 800-1,500 double at the 2005 world championships.

Contreras competed in the women's 53-kilogram category, Tsoumeleka finished ninth in the 20km walk, and Perisic was eliminated in the first-round heats of the 800m.

The 37-year-old Rebellin finished second behind Spain's Samuel Sanchez in the Olympic road race, and Schumacher finished 13th in the Beijing time trial and dropped out before the finish of the road race.

Astana rider Levi Leipheimer(L) of the U.S. and Gerolsteiner's Stephan Schumacher (R) of Germany smile before the start of the stage nine of the Tour of Spain "La Vuelta" cycling race between Vielha and Sabinanigo Sept. 8, 2008.

The IOC previously disqualified nine athletes for doping at the Aug. 8-24 Olympics. In addition, there were six doping cases involving horses in the equestrian competition. The IOC has already stripped four athletes of Beijing Olympic medals, namely, Ukrainian heptathlete Lyudmila Blonska (silver), Belarusian hammer throwers Vadim Devyatovskiy (silver) and Ivan Tsikhan (bronze) and DPR Korean shooter Kim Jong Su (silver and bronze).

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