(CNN) -

The International Olympic Committee has called on disgraced cyclist Lance Armstrong to return the bronze medal he won at the 2000 Olympic Games, an IOC spokesman said Thursday.

The move came in advance of a televised interview in which Armstrong is believed to acknowledge for the first time that he used prohibited performance-enhancing drugs in his career.

While talk show host Oprah Winfrey has not released details of exactly what Armstrong said in the recorded interview, she appeared to confirm media reports Tuesday that the former seven-time Tour de France champion admits doping and lying about it.