AIGLE, Switzerland -- Tour of Turkey winner Mustafa Sayar has been provisionally suspended and faces being stripped of victory after testing positive for the blood-boosting hormone EPO at an earlier race.
The International Cycling Union says Sayar had traces of EPO in a urine sample given at the Tour of Algeria on March 11.
The 24-year-old Turkish rider then won his home country's signature event, an eight-day stage race, in April.
The UCI says Sayar has been suspended while the Turkish cycling federation prosecutes a disciplinary case.
Sayar's victory in the Tour of Turkey's sixth stage on April 26 provoked frustration from rivals.
German sprinter Marcel Kittel, who won two stages, wrote on Twitter that "I was not often in my life so angry about a result of someone else."