The Olympics may have come to an end but the International Olympic Committee is still hard at work on looking through drug test results for athletes with banned substances in their systems.

Nadzeya Ostapchuk became the first athlete to lose her medal following the 2012 Summer Games in London, according to DPA.

Ostapchuk won a gold in the women's shotput with a throw of 21.36 meters after three attempts. She also won a bronze medal in the same event in the 2008 Summer Games in Beijing, China.

The athlete gave testers two urine samples during the games before and after she was scheduled to compete on Monday, Aug. 6. Both tests revealed the presence of metenolone, an "anabolic agent under the 2012 prohibited list."

The National Olympic Committee of Belarus vowed to conduct an investigation into the matter. The IOC ruled that she must surrender her medal and other winnings. Her team doesn't have an explanation for how the substances were in the sample, but conceided its presence in her system at the time of competition.

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