British sprinter CJ Ujah has been suspended from competition after testing positive for a banned substance.
Ujah, 27, was part of Team GB men’s 4x100m relay team that won silver at the Olympics in Tokyo this month.
He has been temporarily suspended, the Athletics Integrity Unit (AIU) said.
The AIU said a test showed “the presence / use of a banned substance (Ostarine and S-23).”
A spokesman for UK Athletics said the governing body did not comment on ongoing processes.
Ujah, who have not yet commented, won the 100m at the British Championships in June.
Britain’s men’s quarterback missed the 4x100m title by just one hundredth of a second in Tokyo.
Ujah ran the opening leg when anchor runner Nethaneel Mitchell-Blake was overtaken on the line by Italy’s Filippo Tortu.
World Athletics Anti-Doping Rules state that in cases where an athlete who has performed an ADRV competed as a member of a relay team, the relay team must be automatically disqualified from that event, with all the consequent consequences for the relay team, including forfeiture. of all titles, prizes, medals, points and prize and appearance money “.
Enobosarm, or Ostarine, is listed as an anabolic drug – banned at all times – on the World Anti-Doping Agency’s list of banned substances.
The UK anti-doping website (Ukad) said it had “similar effects as testosterone”.
S23 is a selective androgen receptor modulator (Sarm) that, according to the United States Anti-Doping Agency (Usada), “has similar anabolic properties to anabolic steroids”.
Ujah may request analysis of the B sample – kept for storage while the A sample is being analyzed – and should this confirm the negative analytical finding [AAF], the case will be referred to the Anti-Doping Division of the Court of Arbitration for Sport [Cas ADD].
In return, the International Testing Agency (ITA) said: “Cas ADD will consider the issue of finding a breach of anti-doping rules [ADRV] and the disqualification of the men’s 4 x 100 relay results from the British team “.
Three other athletes have been suspended after tests performed during the Olympics in Tokyo.
They are Moroccan 1500m runner Sadik Mikhou, shot putter Benik Abramyan from Georgia and Kenyan sprinter Mark Otieno Odhiambo.
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