The president of the Russian Bobsled Federation, Alexander Zubkov, told The Associated Press on Friday that a drug-test sample that Nadezhda Sergeeva gave on Sunday was positive. The second, a bobsledder who was wearing a shirt that read "I Don't Do Doping, I Am Za Sport" in a YouTube video that has since been deleted by the user.
Sergeeva and her brakewoman Anastasia Kocherzhova finished 12th in the women's two-person bobsleigh which took place on Tuesday and Wednesday, but their results have now been expunged from the record.
Saturday's announcement comes after Russian curler Alexander Krushelnitsky agreed to hand back his mixed-team bronze medal after testing positive for meldonium, which can aid in endurance.
"Especially in light of the second doping offence, our position is that the flag should not come into the closing ceremonies with the Russian team", Smith said Saturday at a news conference to announce Canada's flagbearer.
Trimetazidine was among the banned substances identified in the McLaren Report as being used by Russian athletes before Sochi 2014 but not being properly reported as positive by Moscow Laboratory director Grigory Rodchenkov.
Previously it was reported that on February 18, she was tested positive for a heart medicine that is on the list of forbidden.
Earlier this month, Sergeeva, a bobsled pilot, told the AP that competitors from other countries had warmed to her after she passed International Olympic Committee vetting for Pyeongchang, which included an examination of her drug-testing history.
International Olympic Committee meets to decide on revoking Russia's doping ban
A total of 168 Russian athletes are competing in the 2018 PyeongChang Olympics as Olympic Athletes from Russia because the country was barred from officially competing in the Winter Games due to doping-related issues.
Should the ban be lifted, Russian Federation could be allowed to take place in Sunday's closing ceremony in PyeongChang with its flag and national symbols restored.
"The athlete has admitted the anti-doping rule violation; she is disqualified from the women's bobsleigh event", it said.
"I feel it. Maybe it's a sign to them that we're clean", Sergeeva said.
The rower who won a silver medal in 1984 became an International Olympic Committee member in 2016.
Canadian flag-bearer Kim Boutin, who won a silver and two bronze medals in short-track speedskating, felt the closing ceremonies will be an important part of her first Winter Games experience.
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