A second Russian athlete has tested positive for a performance-enhancing drug at the Pyeongchang Winter Olympics.

Bobsledder Nadezhda Sergeeva tested positive for a heart drug on February 18, five days after a previous doping test returned a negative result for her, this according to the Russian bobsleigh federation in announcement today.

This is a major blow for the nation’s hopes of regaining its Olympic status and drawing a line under years of doping scandals.

The news came a few hours after hundreds of Russian fans roared in celebration when teenage figure skater Alina Zagitova delivered their team’s first gold medal.

Earlier this week, Russian curling medalist Alexander Krushelnitsky agreed to hand back his mixed-team bronze medal after testing positive for Meldonium.