Cyclist Hamilton hands over Olympic gold medal

LAUSANNE, Switzerland - Tyler Hamilton has given his 2004 cycling gold medal to the United States Anti-Doping Agency.

In an interview with "60 Minutes" broadcast Thursday on the "CBS Evening News," Hamilton admitted he doped and said Lance Armstrong did as well - — using the blood booster EPO in the 1999 Tour and before the race in 2000 and 2001. Armstrong's string of seven straight wins lasted from 1999-2005.

The International Olympic Committee had said it could strip Hamilton of his time trial gold at the Athens Olympics, but USADA released a statement Friday saying Hamilton had already handed over the medal.

The IOC provisionally investigated Hamilton for doping after he won in 2004, but the case was dropped after his backup sample was mistakenly frozen.

Hamilton's former U.S. Postal Service teammate Viatcheslav Ekimov of Russia stands to be upgraded from silver.

Armstrong posted a message for Ekimov on his Twitter page late Thursday.

"Congratulations to (at)eki-ekimov on his 3rd Olympic Gold Medal!!" the seven-time Tour de France champion wrote.