Kyrgyzstan weightlifter Izzat Artykov has had his Olympic bronze medal from the men's 69-kilogram class revoked after testing positive for strychnine, the Court of Arbitration said Thursday.
The 22-year-old Artykov entered the Rio Games as the 2016 Asian champion but finished third behind China's Shi Zhiyong and Turkey's Daniyar Ismayilov.
Colombia's Luis Javier Mosquera Lozano will move into the bronze medal position having finished fourth in the standings.
A handful of doping cases have been announced at the Rio Games so far but most were from tests carried out in out-of-competiton testing before the Olympics.
Chinese swimmer Chen Xinyi had already secured fourth place in the 100-metre butterfly before testing positive for hydrochlorothiazide. She was prevented entering the 50m freestyle.
Artykov is the first podium finisher to have a medal revoked in Rio for doping.
Weightlifting was been overshadowed by several doping scandals in the run-up to the Games with Bulgaria banned from qualifying after 11 athletes were found doping in 2015.
Other countries, including Kazakhstan, Russia and Belarus, have had multiple athletes return positive tests in recent years.
Strychnine is a potentially fatal poison but it has history in the Olympic Games having been legally used to help American Tom Hicks to marathon gold in 1904. Supporters plied Hicks with strychnine and brandy to get him through the race, though he required medical treatment upon finishing.