Former world cycling champion Tom Boonen has been barred from this year's Tour de France after testing positive for cocaine.
Tour organizers say the rest of Boonen's Quick Step team can still compete in the race.
The Belgian rider apologized to his fans Wednesday in Brussels. He did not directly confirm or deny allegations that he had taken cocaine. Belgian prosecutors opened a probe Tuesday into possible cocaine possession by Boonen.
Boonen, world champion in 2005, earned the green jersey as the best sprinter in last year's Tour.