"We consider these restrictions imposed by the United States on Russia to be illegal, and we will also treat accordingly similar steps if they follow," Kremlin spokesman Dmitry Peskov said on Wednesday, Xinhua news agency reported.
Russian officials said that Washington is using far-fetched excuses to justify its plan of new sanctions, as it accuses Russia of failing to meet the terms of its Chemical and Biological Weapons Control and Warfare Elimination Act (CBW Act) of 1991.
"The reference to US legislation, which Russia supposedly must comply with, looks dubious. Russia is not obliged to comply with any of the laws of the US," Leonid Slutsky, head of the State Duma's international affairs committee, was quoted as saying.
The lack of arguments for the introduction of new sanctions against Russia makes US politicians look for "convincing evidence" of Moscow's guilt where it is absent and cannot be found, Slutsky said.
Nevertheless, Russian officials said the possible sanctions would not exert major influence on Russia.
Deputy Finance Minister Sergei Storchak said Russia's national and institutional investors have learnt to deal with possible risks on the national debt market via previous experience, and that the country has enough reserves to tackle issues of the federal budget deficit.
"Wherever it is possible, we will challenge the actions of the Americans," Storchak said.
"Nothing critical will happen. I'm sure of it. But all of this is unpleasant and, of course, will force us to make certain decisions," Russian Prime Minister Dmitry Medvedev was quoted by RIA Novosti news agency as saying.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)