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Cycling's global governing body the UCI on Thursday announced that Russian rider Valery Kaykov had been suspended provisionally after failing an out-of-competition doping test.
The UCI said that it acted after a lab in the German city of Cologne, accredited by the World Anti-Doping Agency, found that an A-sample of Kaykov's urine contained GW1516 sulfone.
The substance was found in a test conducted on March 17 and is a so-called metabolic modulator -- which helps boost the production of hormones which can enhance an athlete's performance.
"The provisional suspension of Mr. Valery Kaykov remains in force until a hearing panel convened by the Russian Cycling Federation determines whether he has committed an anti-doping rule violation under Article 21 of the UCI Anti-Doping Rules," the governing body said.
The RusVelo rider has the right to request a test of his B sample, it added.