By Duncan Mackay

Lance Armstrong on Oprah WinfreyFebruary 7 - Lance Armstrong has been given a two-week extension by the United States Anti-Doping Agency (USADA) after offering to "assist in the effort to clean up the sport of cycling".

Armstrong had originally been given until yesterday to confess all under oath after admitting to doping during each of his seven Tour de France triumphs in a televised interview with Oprah Winfrey last month.

USADA has now set a new deadline.

"We have been in communication with Mr Armstrong and his representatives and we understand that he does want to be part of the solution and assist in the effort to clean up the sport of cycling," said USADA chief executive Travis Tygart.

"We have agreed to his request for an additional two weeks to work on details to hopefully allow for this to happen."

USADA claimed last year that Armstrong had led "the most sophisticated, professionalised and successful doping programme sport has ever seen".

Armstrong may still face a criminal investigation by Federal authorities for obstruction, witness tampering and intimidation.

A previous criminal inquiry for crimes reportedly including drug distribution, fraud and conspiracy was suddenly dropped a year ago.

Contact the writer of this story at [email protected]

Related stories
January 2013: Armstrong is still lying about doping, claims WADA President
January 2013: Armstrong - I doped for all seven Tour de France victories
January 2013: Armstrong confesses to doping on Oprah Winfrey
January 2013: Jaimie Fuller - Hey Lance, if you're going to confess, you better do it right
January 2013: Armstrong to give "no-holds barred" interview to Oprah Winfrey - but critics fear he will get an easy ride