KIEV, Ukraine (AP) Ukrainian athlete Anastasia Mokhnyuk has been provisionally suspended after becoming the second medalist from last month's world indoor track championships to test positive for meldonium.
Mokhnyuk won silver in the pentathlon at the championships in Portland behind winner Brianne Theisen-Eaton. Fellow Ukrainian Alina Fodorova took the bronze.
Mokhnyuk said she had been taking meldonium, usually prescribed as a heart drug, for medical reasons before it was banned on Jan. 1.
''For the duration of the proceedings, I am prepared to cooperate on this issue and hope for an objective verdict,'' she said in a statement on the Ukrainian Athletics Federation website.
Track and field's world governing body, the IAAF, confirmed that Mokhnyuk was provisionally suspended pending resolution of the case but refused to comment further.
On Tuesday, the Romanian athletics federation said Elena Mirela Lavric, who won bronze in the 4x400-meter relay in Portland, had failed a test for meldonium.
Amid uncertainty over how long meldonium stays in an athlete's system, the World Anti-Doping Agency said in a note made public Wednesday that athletes who tested positive could avoid sanctions if it is determined they took the drug before Jan. 1.
WADA said that those who tested positive after Jan. 1 but before March 1 could be in line for leniency, though both Lavric's and Mokhnyuk's positives came after that window closed.
''Reviews of meldonium cases will be conducted on a case by case basis,'' IAAF spokesman Chris Turner told The Associated Press.