Russia's Yuliya Zaripova has been stripped of the gold medal she won in the women's 3,000-metеr steeplechase at the 2012 London Olympics.
Тhe International Olympic Committee said on November 21 said Zaripova, 30, who tested positive for turinabol, was among 12 athletes disqualified from their events for failing retroactive anti-doping tests.
The others include two Russian silver medalists, the weightlifters Aleksandr Ivanov and Natalia Zabolotnaya.
Other sanctioned athletes were from Georgia, Kazakhstan, and Ukraine.
The IOC is currently retesting more than 1,000 athlete samples from the 2008 and 2012 Olympic Games, using new techniques.
Russia has been accused by a World Anti-Doping Agency report of running a "state sponsored" doping program.