LAUSANNE — Russian weightlifter Oleg Perepetchenov was stripped of his 2004 Olympic bronze medal Tuesday after a retest of his sample from the Athens Games returned positive for banned substance clenbuterol. The IOC demanded the return of his medal and his diploma “as soon as possible” from the Russian Olympic Committee, spokesman Mark Adams told reporters. Perepetchenov, third in the 77kg category, is the fifth Athens Games medalist to be stripped of a medal following sample retests. Ukraine's shot put champion Yuriy Bilonog, women's shot putter Svetlana Krivelyova of Russia and discus thrower Irina Yatchenko of Belarus were demoted in December. — Reuters