Cycling's world governing body, the International Cycling Union, says it has no evidence of doping by seven-time Tour de France champion Lance Armstrong and can not express an opinion on recent unsubstantiated doping allegations.

The UCI said in a statement it has not received any official information or documents from anti-doping authorities or the laboratory involved in testing samples from the 1999 Tour de France. 

Last month, the French newspaper L'Equipe charged that Armstrong had tested positive for the endurance boosting drug EPO during the 1999 Tour de France. 

The newspaper cited evidence taken from frozen "B" samples given at the tour, and two tests are needed for a positive result.  The "A" samples were used and destroyed in 1999, making a second test impossible.

Armstrong, 33, has vehemently denied ever using drugs. The American cyclist has questioned the validity of tests on samples frozen six years ago,  how the samples were handled since then and how he could defend himself when the confirming evidence no longer exists. 

Some information for this story provided by AP.