The UCI announced Thursday that it has provisionally suspended Oscar Sevilla after the Spanish rider tested positive for hydroxyethyl starch in a urine sample collected last month at the Vuelta a Colombia.

HES, a banned substance, can be used as a blood plasma substitute.

The provisional suspension will remain in force until a hearing panel convened by the Spanish Cycling Federation determines whether Sevilla has violated anti-doping rules, the UCI said.

Sevilla has the right to request and attend the analyses of his B sample, the governing body added.

Sevilla was previously linked to the OperaciĆ³n Puerto case in Spain and prevented from racing in the 2006 Tour de France. He was then fired by his German team T-Mobile.

At the 2001 Tour he led the best young rider classification and finished seventh overall. The 33-year-ld Spaniard has raced with the Kelme, Phonak, T-Mobile and Rock Racing teams during his career.