Images mixed by Tetyana Lokot.
Ukraine on Tuesday blocked popular Russian social networks and an internet search engine as it expanded sanctions against the Kremlin for its alleged backing of a three-year war in the separatist east. VKontakte is a Facebook-like social media website that had 27 million Ukrainian users in 2014; Odnoklasniki, a website that connects former classmates and is popular among older generations, had 11 million users in Ukraine in 2014.
Those targeted include social networks VK.com and Odnoklassniki, search engine Yandex and the Mail.ru email service.
In March, Ukraine imposed sanctions against all five operations of Russian state-owned banks, the Ukrainian offices of Sberbank and VTB, BM Bank (VTB's subsidiary), Prominvestbank (VEB's subsidiary) and VS Bank (Sberbank's subsidiary).
The document stipulates that Ukraine will "refuse to issue visas to foreign nationals, ban them from entering the country and impose other restrictions".
Ukraine, along with Western countries, have targeted Russian Federation with sanctions because of Moscow's annexation of Crimea in 2014 and material support for separatists in the country's southeast, including with direct military means.
VK.com, Mail.ru and Yandex.ua are the most visited sites in Ukraine besides Google and YouTube.
A spokesperson for the Presidential Administration confirmed that Poroshenko had signed the decree and said he expected the NSDC to comment soon. There was no immediate comment from other companies on the list.
But human rights groups have voiced criticism of Ukraine's decision to apply its sanctions against various forms of cultural entertainment as a violation of free speech.