Serghei Tarnovschithe, BRAZIL RIO 2016 OLYMPIC GAMES.jpg
Gold medalist Sebastian Brendel of Germany (C), silver medalist Isaquias Queiroz dos Santos of Brazil (L), and bronze medalist Serghei Tarnovschithe of Moldova (R) pose with their medals during the awards ceremony in the men's Canoe Single 1000m final race of the Rio 2016 Olympic Games Canoe Sprint events at the Lagoa Rodrigo de Freitas in Rio de Janeiro, Brazil, 16 August 2016.

Two Olympic bronze medal winners, Kyrgyzstan weightlifter Izzat Artykov and Moldovan canoeist Serghei Tarnovschi, have failed doping tests.

And Indian wrestler Narsingh Yadav is also out of the Rio Games and banned for four years as the World Anti-Doping Agency (WADA) won an appeal at the Court of Arbitration for Sport (CAS) on Thursday.

Artykov has had his Olympic bronze medal from the men's 69-kilogram class revoked after testing positive for strychnine, the CAS said.

Tarnovschi, who won bronze in the single canoe 1,000-metres, has been suspended from the double canoe 1,000m "following adverse results from a pre-competition test," the International Canoe Federation said.

He finished behind Germany's Sebastian Brendel and Brazilian Isaquias Quieroz dos Santos. Should he eventually be disqualified from the race, Russia's Ilia Shtokalov would move into the bronze medal position.

Weightlifter Artykov, 22, 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.

CAS meanwhile confirmed that Brazilian cyclist Kleber da Silva Ramos and Chinese swimmer Chen Xinyi are both disqualified from their Olympic events after accepting suspensions following positive doping tests.

Chen had been suspended on August 12 and Kleber on August 13.

Chen, 18, failed a doping test in Rio on August 7, the Chinese Swimming Association said last week. She had already secured fourth place in the 100-metre butterfly before testing positive for the banned diuretic medication hydrochlorothiazide. She was prevented from entering the 50m freestyle.

Kleber, 30, tested positive for the blood-booster Cera shortly before the Games, global cycling body UCI said last week. He did not finish the Olympic road race.

The Indian National Anti-Doping Agency cleared Yadav, a former Commonwealth Games champion, on August 1 after a positive test for the anabolic steroid methandienone from July 26. Both samples of the doping test came up positive.

However, WADA was successful in its appeal to CAS and though a first-time offender, Yadav has been given a lengthy and immediate ban.

He is now unable to take part in the 74kg freestyle category at the Games on Friday.

A handful of doping cases have been announced at the Rio Games, mostly from tests carried out in out-of-competiton testing before the Olympics.

Weightlifting has 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, found in Artykov's sample, 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.

Related stories

Latest news

Trump administration reverses transgender bathroom protections

The Trump administration on Wednesday withdrew Obama-era guidance about the use of school and university bathrooms by transgender students, local media reported.

Several Dakota Access Pipeline protesters arrested as deadline passes

Several people at a camp protesting against a controversial oil pipeline in the US state of North Dakota were arrested Wednesday after a deadline to vacate the land passed, local media reported.

Germany deports 18 rejected asylum seekers to Afghanistan

A Kabul-bound plane with 18 Afghan migrants on board took off from Munich Airport late Wednesday, its passengers becoming the third group of rejected asylum seekers to be deported by German authorities back to Afghanistan.

New Romanian justice minister named after anti-corruption protests

Romanian Prime Minister Sorin Grindeanu has named a former judge to be the country's next justice minister, after the previous office holder resigned under pressure from mass anti-corruption protests.

Le Pen's chief of staff indicted in European Parliament jobs probe

The chief of staff of Marine Le Pen, the far-right candidate for president in upcoming French elections, was indicted Wednesday over allegations of irregular reimbursements from the European Parliament, a judicial source told dpa.

Montenegrin police extradites Miodrag Jovic to Croatia

Montenegrin police reported on Wednesday that they extradited to Croatia Miodrag Jovic (48) from Glina, after whom Interpol Zagreb issued an arrest warrant.

Croatian minister attends CoMoCoSEE conference in Albania

Culture Minister Nina Obuljen Korzinek participated in a third conference of the Council of Ministers of Culture of South-Eastern Europe (CoMoCoSEE) that took place in Tirana on February 21-22.

New Somali president asks al-Shabaab to surrender to 'help' country

Somalia's newly elected President Mohamed Abdullahi Farmajo asked Islamist terrorist group al-Shabaab to surrender in order "to help rebuild" the conflict-ridden East African nation.

Serbia's EU negotiator says minority rights neglected

The head of the Serbia's European Union accession negotiation team, Tanja Miscevic, said in Novi Sad on Wednesday that minority rights had been neglected for many years and added that positive results in that regard cannot be achieved over night, the Beta news agency has reported. 

Scientists: Nearby star's 7 rocky planets are "best bet" for life

New analysis of telescope data shows a dwarf star just 40 light years from Earth has at least seven apparently rocky planets with potential to harbour water, an international team of scientists announced Wednesday.

Croatian PM receives EIB Vice-President

Prime Minister Andrej Plenkovic met on Wednesday with European Investment Bank (EIB) Vice-President Dario Scannapieco for talks on the bank's contribution to a new investment cycle in Croatia and its support to the Croatian government to implement key projects, a press release from the government's office said.

Bomb explodes outside police officer's home in Northern Ireland

A bomb exploded outside a police officer's home in Northern Ireland on Wednesday but there were no immediate reports of casualties.