One of five prominent Russians blacklisted by the US has slammed it as a last act of "spite" before Barack Obama cedes power to Donald Trump, BBC reports.
Lawmaker Andrei Lugovoi, one of two suspects in the poisoning of former KGB agent Alexander Litvinenko in London in 2006, said he was baffled by the move.
Mr Trump, who assumes the presidency on 20 January, has vowed to restore closer ties with Russia.
Kremlin spokesman Dmitry Peskov said he had hope ties would improve "soon".
Thirty-five Russian diplomats have been expelled from US soil over allegations that Russia ran a hacking campaign to influence the American presidential elections.
Russia has dismissed the claims as a "witch-hunt".