Bulgarian middle-distance runner Daniela Yordanova tested positive for testosterone and will not compete at the Beijing , her federation said on Saturday.
Team spokesman Todor Shabanski said the 1,500-meter runner was on the verge of flying to Beijing but will stay behind after the result of the "B" sample became known.
The 32-year-old Yordanova was fifth in the 1,500 at the 2004 Athens Games and was the bronze medalist at the 2006 European Championships.
"It was confirmed. She has withdrawn and will not be traveling to Beijing," Shabanski said.
She was positive in a June 13 out-of-competition test in the Bulgarian capital of Sofia.
Athletics has been desperately trying to clean up its sport in the run-up to the , after being involved in a series of doping scandals that undermined its popularity in recent years.
Seven Russian women were provisionally suspended by the International Association of Athletics Federations two weeks ago in the doping scandal. They included Yelena Soboleva, a world record holder and world champion middle-distance runner who was favored to win the 800 and 1,500 at the Beijing .