US cycling star Lance Armstrong has announced he will no longer fight drug charges from the US anti-doping agency, ahead of a Friday deadline.In a statement, the 40-year-old maintains he is innocent, but says he is weary of the "nonsense" accusations.

The US anti-doping agency (USADA) now says it will ban Armstrong from cycling for life and strip him of his seven Tour de France titles.Armstrong retired from professional sport in 2011.

Read