The 63-year-old former head of the now-shuttered Nike Oregon Project was suspended in 2019 for a catalogue of drugs violations.
The AIU announced Thursday that the doping control laboratory in Tokyo had notified the International Testing Agency of an “adverse analytical finding” in Ujah's doping sample.
WADA issued a statement ahead of a documentary by Germany's ARD television, days before the start of the Tokyo Olympics, that claims such an occurrence was proven in several cases in an experiment.
Sport's top court upheld an appeal by World Athletics against a ruling by the federation's own disciplinary tribunal which had cleared Nigerian-born Naser of missing doping tests.
Sun, who was banned for three months in 2014 for a separate doping offence, has always protested his innocence in the murky events of September 2018.
Olympic 100m hurdles champion Brianna McNeal banned by Athletics Integrity Unit for doping violation
McNeal, 29, can still take part in the US trials for the Tokyo Olympics later this month while she appeals the ban, which is backdated to August 15, 2020, the AIU said in a statement.
The World Anti-Doping Agency on Friday approved an innovative method of screening dried blood for banned substances which will be trialled for the Tokyo Olympics
The Chinese swimmer was accused of destroying a blood vial with a hammer when collectors visited his home in September 2018.
The weightlifter, a national record holder and who has participated in several international tournaments including the Commonwealth Championship where she won gold, was set to be a part of the Indian team for the Asian Championship to be held in Tashkent, Uzbekistan from 16 to 25 April.
Naser ran the fastest women’s 400 since 1985 to win the world title 18 months ago in Doha, Qatar, while she was under investigation.
The ANA scheme allows Russian competitors who meet strict anti-doping criteria to participate in global track and field events, but under a neutral flag and in neutral clothing.
AFI chief Adille Sumariwalla laments assumption that two Tokyo 2020 hopefuls caught doping were track and field athletes
Asked if it is a matter of concern that athletes are in doping net, ahead of the Olympics, AFI president Adille Sumariwalla did not give a direct answer.
The tribunal resumes in Manchester on Wednesday and is set to determine whether Freeman can continue to work as a doctor as it considers sanctions.
Richard Freeman said, "I'm still shocked at this verdict. I've made plenty of mistakes, but I'm not a doping doctor." He insisted that he'd ordered testosterone to treat former performance director Shane Sutton's erectile dysfunction.
The Athletics Integrity Unit said the case involved “submission of forged documents and false explanations” in a 15-month probe into why high jumper Danil Lysenko wasn't available for drug testing.
Olympic hurdles champion Brianna McNeal, serving second doping suspension, insists she’s ‘very clean’
The Athletics Integrity Unit said last month that McNeal had been suspended for "tampering" with part of a doping control.
A punishment would not be decided until after a full hearing. The ITF said Yastremska has a right to appeal, but has not yet done so.
The ban, as it stands, means Russia would miss the re-arranged Tokyo Olympics 2020 next year as well as football's 2022 World Cup in Qatar and the 2022 Winter Olympics in China.
A once-promising rider known as 'The Cobra', Ricco's career collapsed when he was found to have taken the banned blood-booster CERA during the 2008 tour.
I'm not sure Russian doping issue can be resolved in 'near future', says World Athletics chief Sebastian Coe
Russia was suspended in 2015 after a report commissioned by the World Anti-Doping Agency (WADA) found evidence of mass doping among track and field athletes.