Bulgarian runner Silvia Danekova has tested positive for banned blood booster EPO at the Rio Olympics.
The 33-year-old, a 3,000m steeplechase athlete, tested positive in a doping control conducted a few days after her arrival in Brazil on 26 July.
Danekova has been temporarily suspended pending the test of her B sample.
"Unfortunately, we have a positive test," confirmed the Bulgarian Olympic Committee, whose weightlifting team was banned from the Games for doping.
Danekova raced in the 3,000m steeplechase at the London Olympics in 2012 but did not get beyond the heats.