A Greek TV station says Fani Halkia, who won gold in the women's 400 meters hurdles at the 2004 Athens Olympics, tested positive for a banned substance.

Skai TV also said Saturday that Halkia has already left the Olympic village.

Another Greek station, Mega Channel, also said an athlete had tested positive for the banned steroid methyltrienolone. But it did not name the athlete.

Halkia was tested a few days before the Beijing Olympics in Japan, where Greece's track and field team had been training.