"What the USA authorities are doing today is an infringement of the fundamental rights of citizens and freedom of speech", Vyacheslav Volodin said in a statement, reacting to Washington's demand that Russian State-funded TV station RT, also known as Russia Today, register in the United States as a foreign agent.
"This requirement is discriminatory, it contradicts the principles of democracy and freedom of speech, it does not give us equal competition with other foreign TV channels that work in America without being registered as foreign agents", she said.
Nikolov noted that foreign agent status implies a wide range of measures by the USA authorities, but no one knows what exactly can follow after this status is acquired. Such a registration would require any reporting to be labeled as being financed or influenced by the Russian government, among other restrictions.
US intelligence agencies said in January that RT and the news agency Sputnik, along with a network of "quasi-government trolls", interfered in the 2016 USA presidential election on behalf of the Russian government by pushing anti-American propaganda, claims that RT denies.
Reuters reported that Russian lawmakers said "the move was retaliation for a demand by the U.S. Department of Justice that Kremlin-backed TV station RT register in the United States as a "foreign agent", something Moscow has said it regards as an unfriendly act".
Zakharova did not specify which outlets would be targeted or what the actions would be.
"Every media now has its own pages in social networks, which also publish their news, articles and videos".
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Earlier an RT statement said the US Department of Justice "has given the broadcaster until Monday to register as a foreign agent, otherwise the channel's head faces arrest and its accounts could be frozen".
RT began operations in 2005 under the brand Russia Today, claiming to present the Russian view on global news and to cover stories ignored by mainstream Western news media.
He said some USA media in Russian Federation were trying to turn US public opinion against Moscow.
"The Russian side has repeatedly warned that any measures limiting activity of the Russian mass media in the United States will inevitably trigger an immediate symmetrical response", the Russian embassy posted.
An intelligence report in January alleged the outlet spearheaded "strategic messaging for [the] Russian government", fueling political conflicts in the USA during the 2016 campaign.
Last Thursday, Twitter announced it would drop advertising by RT and Sputnik-owned accounts on its network due to their alleged meddling in the US presidential election a year ago.