The SBU press secretary Olena Gitlianska said in a Facebook release that Ukrainian law enforcers have discovered a whole network of media structures controlled by Russian Federation.
Earlier on May 15, the Security Service of Ukraine announced that it had exposed a media network run by Russian Federation and carried out searches at the RIA Novosti's Kyiv office. Kiev has banned multiple Russian television news channels since 2014, accusing them of disseminating propaganda, and it has deported several journalists, according to CPJ research.
The news agency's chief editor Kirill Vyshinsky was detained outside his home early on Tuesday.
In Washington, U.S. State Department spokeswoman Heather Nauert said the United States shares Ukraine's concern about Russian propaganda, but said that Ukraine must ensure it abides by the law, including worldwide human rights law.
Moscow has been accused of fuelling a rebel conflict in eastern Ukraine that broke out after the annexation of Crimea that has cost the lives of some 10,000 people.
Deputy head of the SBU Security Service of Ukraine Viktor Kononenko said Vyshinsky had been paid Euro 53,000 every month for discrediting the Armed Forces of Ukraine. "That was the reason for the searches".
"The Security Service of Ukraine reports that the head of the anti-Ukrainian propaganda information outlet RIA Novosti Ukraine, Kyrylo Vyshynsky, has been declared a suspect in a crime and detained in accordance with Article 208 of the Criminal Procedure Code of Ukraine", the statement reads.
Russian President Vladimir Putin's spokesman, Dmitry Peskov, who called the SBU's actions against RIA Novosti-Ukraine and Vyshynsky "disgraceful and scandalous", (RFE/RL) reported.
"We will act aggressively and protect the interests of Russian media to the fullest extent".