"I think it's a form of competition without scruples because the US team, obviously, are not capable of beating us fairly at sport," Lavrov said in an interview broadcast by Rossiya-1 TV and published on the website of the Russian Ministry of Foreign Affairs.
Russia has been banned from taking part in the ongoing Pyeongchang Winter Olympics in South Korea.
However, the International Olympic Committee (IOC) allowed a large group of Russians deemed clean to take part as "Olympic Athletes from Russia".
"All rivals must be pushed to one side," he added. "All means are good (in a) campaign which is anti-Russian.
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