Tyler Hamilton (left) and Lance Armstrong during the Dauphine Libere in 2004. (THIERRY ROGE / Reuters)

Lance Armstrong has responded to allegations by his former teammate, Tyler Hamilton, that Armstrong used performance-enhancing drugs “like we all did.” Armstrong responded on Twitter and with a new website.

Armstrong, according to Hamilton, used EPO, which boosts red blood cells, in the 1999 Tour and before the race in 2000 and 2001. Armstrong won the race seven times, starting in 1999.

“I saw [EPO] in his refrigerator,” Hamilton said in a “60 Minutes interview that will be aired Sunday. “ ... I saw him inject it more than one time, like we all did. Like I did, many, many times.”

Armstrong responded immediately on Twitter after an excerpt of the interview was shown on the “CBS Evening News:”

20+ year career. 500 drug controls worldwide, in and out of competition. Never a failed test. I rest my case.less than a minute ago via ÜberSocial Favorite Retweet ReplyLance Armstrong

In addition, a website disputing the allegations went live Thursday night. It’s called facts4lance.com and has a denial from Armstrong’s lawyer as well as a copy of a letter of protest to the chairman of CBS News.

Hamilton was the 2004 Olympic gold medalist in the cycling time trial and the International Olympic Committee may strip him of his medal after his “60 Minutes” admission that he was using.

“If there is any need or possibility to take action we will do it,” Thomas Bach, the IOC vice-president who is in charge of most of the committee’s doping investigations. Although he said he had not yet seen Hamilton’s comments, “we will look into this.”

The head of cycling’s governing body had no comment.