Ukraine's state security service (SSU) on Thursday arrested a government official they claim was doubling as an "agent of Russian intelligence." The official formed part of Prime Minister Volodymyr Groysman'sinner circle, according to authorities.
"Together with the Security Service of Ukraine, an official in the government's secretariat was found to be working for a long time in the interests of the enemy state. He was detained," Groysman said in a post on Facebook.
Kremlin spokesman Dmitry Peskov said Russian authorities are aware of the arrest, "but we have no information," reported state-owned TASS news agency.
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Authorities did not provide a name or position for the suspect, but local media reported that Stanislav Yezhov, the premier's assistant, had been detained a day earlier.
Yezhov reportedly accompanied Groysman on all international trips during his time as assistant, and previously worked in the president's office and the Ukrainian embassy in the US. Ukraine's state security service said he had been recruited by Russia's Federal Security Service (FSB).