AIGLE, Switzerland (AFP) — Spanish rider Oscar Sevilla was provisionally suspended by the International Cycling Union on Thursday for suspected blood doping, four years after he was connected to the Operation Puerto investigation. The UCI said Sevilla tested positive for hydroxyethyl starch — which increases blood volume — in a urine sample taken at the Tour of Colombia last month. Sevilla joined a Colombian team this season following two years with the U.S.-based Rock Racing squad, which folded after the UCI denied it a license to race. Sevilla is suspended until the Spanish Cycling Federation holds a disciplinary hearing. The 33-year-old rider can request and attend a laboratory analysis of his backup sample.