• Sources say IOC have asked Armstrong to return medal • US Olympic Committee was informed on Wednesday

Ahead of his "no-holds barred" interview with Oprah Winfrey in which he is expected to admit to doping for the first time, Lance Armstrong has been told to hand back the bronze medal he won at the 2000 Sydney Olympics.

It is understood that the International Olympic Committee wrote to the disgraced former cyclist on Wednesday to inform him he had been stripped of the medal, which the Texan won in the time trial.

Sources told the Guardian that the decision was taken in principle at December's executive board meeting but that the IOC was waiting for confirmation from global governing body, the UCI, that he had not appealed against Usada's decision to strip him of his seven Tour de France titles and ban him from sport for life.

The 21 days in which he could have appealed have now elapsed and the US Olympic Committee was also informed of the decision last night.

"Following the recent decisions of Usada and the UCI regarding the competitive cycling results of Lance Armstrong, the IOC has disqualified Armstrong from the events in which he competed at the Sydney 2000 Olympic Games," the IOC said in a statement.

"Namely, the men's individual road race, where he finished 13th, and the men's individual time trial, where he finished 3rd and was awarded with a bronze medal and a certificate."

Tyler Hamilton, one of the 11 former team-mates who testified against Armstrong, handed back the time-trial gold medal that he won at the 2004 Athens Olympics in early 2011, after he confessed to doping.