The International Cycling Union (UCI) did all it could to stall its doping investigation into Lance Armstrong, U.S. Anti-Doping Agency chief executive Travis Tygart said Wednesday.

The World Anti-Doping Agency called the UCI "deceitful" Tuesday for shutting down its independent doping panel and said it won't participate in an amnesty commission set up by the cycling governing body.

The International Cycling Union (UCI) disbanded what is claimed was an independent commission put together to review any involvement the cycling governing body had in the Lance Armstrong scandal, saying it will go ahead with a "truth and reconciliation commission" instead.

The first public hearing into the Lance Armstrong doping scandal descended into sharp exchanges in London on Friday over the lack of disclosure of documents by the sport's governing body.

UCI Honorary President Hein Verbruggen says the International Cycling Union (UCI) held meetings with riders, including Lance Armstrong, to warn them when suspicious test values showed they were coming close to testing positive for performance enhancing drugs.

Lance Armstrong finally confessed to using performance enhancing drugs during his cycling career on Thursday, admitting he cheated to win all seven of his Tour de France titles.

The former president and current honorary president of cycling's governing body says there was no conflict of interest when he invested in a brokerage account later linked to Lance Armstrong's team owner.

The World Anti-Doping Agency announced Tuesday that it will not participate in an investigation into links that cycling's governing body allegedly had to Lance Armstrong due to "serious concerns" about the inquiry.

The chief of the U.S. Anti-Doping Agency (USADA) tells "60 Minutes Sports" that a representative for Lance Armstrong offered the agency a "donation" in excess of US$150,000 several years before a USADA investigation led to Armstrong being stripped of seven Tour de France titles.

The International Cycling Union (UCI) has asked Court of Arbitration for Sport (CAS) board president John Coates to help choose a team to investigate the governing body's links to the Lance Armstrong doping case.