Trinidad and Tobago sprinter Kelly-Ann Baptiste, has tested positive for a banned substance, according to The Trinidad Express newspaper.
Baptiste, 26, was taking part in the World Athletics Championships in Moscow and due to run in the 100m heats on Sunday morning.
“She has voluntarily withdrawn from the competition and is heading back to her base,” the newspaper quoted Trinidad and Tobago team manager Dexter Voisin as saying.
Voisin did not say that Baptiste had tested positive but the newspaper said a reliable source had confirmed it.
Baptiste won a world 100 metres bronze medal in 2011 was a real prospect for this year’s championship.
Baptiste hails from the same training group of former world sprint champion Tyson Gay who has returned two positive tests for an undisclosed banned substance.