Lance Armstrong attempted to make a donation of "in excess of £150,000" to the US Anti Doping Agency shortly before his seventh Tour de France title, according to Travis Tygart, the organisation's chief executive.
"I was stunned," Tygart told CBS News. "It was a clear conflict of interest. We had no hesitation in rejecting that offer."
In August, Armstrong was stripped of his titles and banned from cycling after declining to contest doping charges against him.
His first interview since the ban is due to air on Oprey Winfrey's TV network next week.
More top news
The business secretary called the move a 'positive step forward' after the US-imposed tariff sparked fears over jobs in Northern Ireland.
A report published by the Boundary Commission for England details plans to reduce the number of MPs by scrapping 50 constituencies.
The slump will spark scrutiny, especially as statistics show a rise in racially or religiously motivated offences following the EU vote.