Russian curler Alexander Krushelnitsky, who tested positive for the banned substance meldonium at the Winter Olympics, said  he has never knowingly doped and welcomed an investigation into the result. 

"I more than anyone else am interested in an investigation as soon as possible to find out the reasons for what has happened," Krushelnitsky said in a statement published on the website of Russia's curling federation.

"I am ready to confirm that not once in the whole time that I have been in sport have I taken any banned substance or competed dishonestly in any way," he said, calling the result "a shock."