Russian athlete Tatyana Tomashova banned for 10 years
Russia's Tatyana Tomashova has been banned from athletics for 10 years and stripped of the silver medal she won in the women's 1,500m in the 2012 Olympics.
Tomashova was sanctioned after testing positive in 2021 for anabolic steroids in re-tests of her out-of-competition samples from June 21, 2012 and July 17, 2012, the Court of Arbitration for Sport said.
The 49-year-old is one of six athletes who finished in the top nine of the London final to have tested positive for performance-enhancing drugs.
Immediately after what has been labelled the "dirtiest race in history", Britain's Lisa Dobriskey, who finished 10th, told BBC Radio 5 Live: "I don't believe I'm competing on a level playing field."
Two-time world champion Tomashova originally finished fourth but was upgraded after Turkish runners Asli Cakir Alptekin and Gamze Bulut lost their medals for doping, with Bahrain's Maryam Yusuf Jamal crossing the line third but later promoted to first.
Ethiopia-born Swede Abeba Aregawi, who also had an anti-doping violation in 2016 but escaped a ban, only received her reallocated bronze medal in a special ceremony at the Paris Olympics last month. That medal will now be upgraded to silver.