After admitting to doping in a “60 Minutes” interview that will air Snday, Tyler Hamilton, the 2004 Olympic gold medalist in the time trial, has turned his gold medal over to the United States Anti-Doping Agency

The International Olympic Committee made the announcement after Hamilton, 40, made his admission and said he saw U.S. Postal Service teammate Lance Armstrong taking performance-enhancing drugs. “I saw him inject it more than one time,” Hamilton said. “Yeah, like we all did. Like I did many, many times.”

“I can confirm that Tyler Hamilton has given his gold medal from the 2004 Athens Olympic Games to USADA and that we will continue to work with the IOC and the USOC as appropriate concerning the final implications of our overall investigation,” USADA chief executive Travis Tygart said in a statement, via the Associated Press.

In an email to the New York Times, IOC spokeswoman Emmanuelle Moreau wrote: “The I.O.C. has been in touch with Usada [sic], which indicated that the athlete has already rendered his gold medal — Athens 2004 time-trial race — and that they are currently pursuing an inquiry. The I.O.C. has taken note of Hamilton’s confession and will, of course, study any potential Games-related implications.”

Hamilton, 40, has twice been sanctioned for doping and is the latest former teammate to indicate that he saw Armstrong using PEDs. Floyd Landis, who was stripped of the 2006 Tour de France title, said he and Armstrong were doping while competing for USPS.

Armstrong denied Hamilton’s accusation and, after Hamilton’s admission, tweeted congratulations to the 2004 Olympic runnerup.

Congratulations to @eki_ekimov on his 3rd Olympic Gold Medal!!less than a minute ago via ÜberSocial Favorite Retweet ReplyLance Armstrong