Possible doping case for Russian Olympian at the Winter Olympics!

Aleksandr Krushelnitcki, an Olympic curler from Russia, left the Pyeongchang Winter Games after a positive preliminary test for the banned substance meldonium. Krushelnitckii won a bronze medal last week with his wife and teammate Anastasia Bryzgalova in mixed-doubles curling, an event making its debut this year in Pyeongchang. The medal was also Russia’s first in curling.

But on Sunday, Krushelnitckii tested positive for meldonium, a heart drug that was banned by the World Anti-Doping Agency in 2016 because of its role in boosting endurance, in what’s called an “A” sample. On Monday, officials tested the “B” sample, and hours later, the Court of Arbitration for Sport formally opened an investigation into Krushelnitckii. The court hasn’t yet scheduled any hearings.