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(AP) -- New revelations from Lance Armstrong's former teammates on "60 Minutes," combined with recent requests by federal authorities for evidence in France, have fed a sense of growing trouble for the world's most famous cyclist.

One of Armstrong's former teammates, Tyler Hamilton, told "60 Minutes" he saw the seven-time Tour de France winner use EPO during his first Tour victory in 1999. Meanwhile, The Associated

Press reported that last month, federal investigators looking into the Armstrong case recently asked French authorities to turn over evidence, including Armstrong's urine samples from the same year.

Armstrong has long denied doping and has never tested positive.

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