Swimmer Jessica Hardy's trip to the Beijing Olympics could be in jeopardy after testing positive for a banned substance, according to a person familiar with the test results.

Hardy's "A" sample from the recent U.S. Olympic trials tested positive, according to a person familiar with the test results who told The Associated Press last night. The person, who requested anonymity because he was not authorized to speak publicly, said the banned substance was a stimulant but did not provide any details.

The Swimming World magazine Web site first reported the positive doping test.

Mark Schubert, head coach and general manager of the U.S. team, and Dave Salo, Hardy's personal coach at Southern California, did not immediately return phone messages left by the AP.

USA Swimming spokeswoman Jamie Olson declined to comment from the team's training camp at Palo Alto, Calif., where Hardy has departed and returned home to be with her family in Southern California, the swimmer's agent said.

Agent Evan Morgenstein told the AP that during a brief phone conversation with Hardy, she told him, "I never did anything wrong. I never cheated."

Typically, a first-time doping offense results in a 2-year ban.

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