<p>British sprinter Chijindu Ujah has been banned for 22 months for a doping violation at last year's Tokyo Olympics, the Athletics Integrity Unit (AIU) said on Monday.</p>.<p>Ujah had been provisionally suspended after Ostarine and S-23 -- substances prohibited by world anti-doping organisation WADA -- were detected in his A and B samples following the men's 4x100m relay final in which Britain finished second behind Italy.</p>.<p>The AIU, which oversees integrity issues in international athletics including doping, said Ujah's ban was effective Aug. 6, 2021 and will be in force until June 5, 2023.</p>.<p>Ujah, 28, and his team mates Zharnel Hughes, Richard Kilty and Nethaneel Mitchell-Blake were stripped of their silver medal in February after a Court of Arbitration for Sport ruling. Canada were upgraded to silver and China to bronze.</p>.<p>The sprinter had said he had "not knowingly or intentionally doped" but Kilty said in February British Athletics and UK Anti-Doping had "hammered home" their rules, asking athletes not to use uncertified supplements.</p>.<p>UKAD said in a statement that the AIU announcement marked another sad chapter in the case and for sport in Britain.</p>.<p>"Every national governing body, athlete, coach and member of support staff should take this case as a warning that doping presents a threat to British sport at the highest levels," said UKAD Chief Executive Jane Rumble.</p>.<p>"This case underlines the need for all sports to redouble their commitment to their anti-doping responsibilities."</p>
<p>British sprinter Chijindu Ujah has been banned for 22 months for a doping violation at last year's Tokyo Olympics, the Athletics Integrity Unit (AIU) said on Monday.</p>.<p>Ujah had been provisionally suspended after Ostarine and S-23 -- substances prohibited by world anti-doping organisation WADA -- were detected in his A and B samples following the men's 4x100m relay final in which Britain finished second behind Italy.</p>.<p>The AIU, which oversees integrity issues in international athletics including doping, said Ujah's ban was effective Aug. 6, 2021 and will be in force until June 5, 2023.</p>.<p>Ujah, 28, and his team mates Zharnel Hughes, Richard Kilty and Nethaneel Mitchell-Blake were stripped of their silver medal in February after a Court of Arbitration for Sport ruling. Canada were upgraded to silver and China to bronze.</p>.<p>The sprinter had said he had "not knowingly or intentionally doped" but Kilty said in February British Athletics and UK Anti-Doping had "hammered home" their rules, asking athletes not to use uncertified supplements.</p>.<p>UKAD said in a statement that the AIU announcement marked another sad chapter in the case and for sport in Britain.</p>.<p>"Every national governing body, athlete, coach and member of support staff should take this case as a warning that doping presents a threat to British sport at the highest levels," said UKAD Chief Executive Jane Rumble.</p>.<p>"This case underlines the need for all sports to redouble their commitment to their anti-doping responsibilities."</p>