MOSCOW (AP) World champion Yulia Efimova has been provisionally suspended on suspicion of breaking anti-doping rules.
The suspension makes breaststroke specialist Efimova, who has won four world titles and an Olympic bronze medal, the latest high-profile name caught up in the series of doping scandals that have dogged Russia over the last two years.
In a brief statement, the Russian Swimming Federation said it had received documents from international governing body FINA stating that Efimova was suspended ''in connection with a possible breach of anti-doping rules.''
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The federation did not confirm reports in the Russian media that Efimova tested positive for meldonium, the same substance found in Maria Sharapova's sample at the Australian Open.
Efimova risks a lengthy ban if found guilty, since it would be her second career doping offense.