MONACO (AP) — Olympic race walk silver medalist Lupita Gonzalez has tested positive for an anabolic steroid.
The IAAF's Athletics Integrity Unit says Gonzalez tested positive for trenbolone and has been provisionally suspended.
The 29-year-old Mexican faces a ban of up to four years.
Gonzalez took silver in the 20-kilometer walk at the 2016 Rio de Janeiro Olympics, losing to Liu Hong of China by two seconds, and at the 2017 world championships in London.
She won the gold medal at the 2015 Pan American Games in Toronto.
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