Lance Armstrong involved in 'most sophisticated' doping scam ever: USADA

Almost 1,000 pages of evidence against Armstrong and fellow US Postal Service cyclists released.

WASHINGTON: The US Anti-Doping Agency said on Tuesday that it has gathered "overwhelming" evidence suggesting that Lance Armstrong and fellow US Postal Service cyclists have engaged in the sport's biggest doping conspiracy ever.

In a statement, the agency said it was releasing its "reasoned decision" and more than 1,000 pages of supporting evidence to the Union Cycliste International and the World Anti-Doping Agency.

"The evidence shows beyond any doubt that the US Postal Service Pro Cycling Team ran the most sophisticated, professionalised and successful doping program that sport has ever seen," it said.

US cyclist Lance Armstrong was officially branded a drugs cheat in August by the US Anti-Doping Agency as it stripped him of his record seven Tour de France titles.

Armstrong was also banned from cycling for life by the agency, which said his decision not to pursue arbitration in an effort to clear himself of doping charges levelled in June triggered the action.