LONDON — On the day he went public with an admission of doping after years of denials, Olympic officials disclosed one more embarrassment for Lance Armstrong: He was stripped of a bronze medal won at the 2000 Sydney Games.

The International Olympic Committee sent a letter to Armstrong on Wednesday night asking him to return the medal, just as it said it planned to do last month. The decision was first reported Thursday by The Associated Press.

On Monday, Armstrong taped an interview with Oprah Winfrey for broadcast Thursday and Friday on her network. A person familiar with the situation told the AP that the winner of seven straight Tour de France titles confessed to Winfrey to using performance-enhancing drugs.

The timing of the IOC move, however, was not related to the TV interview.

The IOC executive board discussed revoking the medal in December, but delayed a decision until cycling’s governing body notified Armstrong he had been stripped of his seven Tour de France titles and all results since 1998. He then had 21 days to appeal.

Now that the deadline has expired, the IOC decided to take the medal away. The letter to Armstrong was also sent to the U.S. Olympic Committee, which would collect the medal.

“Having had confirmation from UCI that Armstrong has not appealed the decision to disqualify him from Sydney, we have written to him to ask for the return of the bronze medal,” IOC spokesman Mark Adams told the AP.

Two months after winning his second Tour de France title in 2000, Armstrong took the bronze in Sydney in the road time trial behind winner and U.S. Postal Service teammate Vyacheslav Ekimov of Russia and Jan Ullrich of Germany.

The IOC opened a disciplinary case in November after a U.S. Anti-Doping Agency report detailed widespread doping by Armstrong and his teammates. The report called it the most sophisticated doping program in sports.

The IOC will not reallocate Armstrong’s bronze medal, just as cycling’s ruling body decided not to declare any winners for the Tour titles once held by the American. Spanish rider Abraham Olano Manzano, who finished fourth in Sydney, will not be upgraded and the bronze medal will be left vacant in Olympic records.