Ukrainian President Petro Poroshenko enforced the decision of the Ukrainian National Security and Defense Council on expanding the list of Russian nationals and entities subject to Ukrainian sanctions and extending earlier sanctions.
The Ukrainian presidential administration said the situation was "under control". and there was "no threat to the work of the website".
Russian Firma 1C bookkeeping software, which has dominated the Ukraine market for use by small and medium-sized businesses, denies any active contacts with the Russian company and says the software has been localised, according to Interfax.
Ukraine blames Russian Federation for the anti-fascist uprising in the industrial east and the secession of Crimea following the 2014 far-right coup in Kiev.
"We have always steered clear of politics", said VK, which claims about 16 million social network users in Ukraine alone. Yandex said that it does not see the sanctions as having a material negative impact on its consolidated results.
Dmitry Peskov, Mr. Putin's spokesperson, called the sanctions "short-sighted" and warned Russian Federation had not "forgotten about the principle of reciprocity".More news: Trump asked Comey to shut down Flynn investigation
One of the social media networks to be banned is the VK, which is commonly referred to as Russia's Facebook.
The decision also covers the Mail.ru email provider and the Odnoklassniki (Classmates) social network.
Presidential decree indicated that sanctions are (were) imposed against nearly 500 legal entities, most of which are registered in Russian Federation. Google's Russian office declined to comment.
Conflict broke out in eastern Ukraine as pro-Russian separatists launched an insurgency against the government in Kiev.
Poroshenko also expanded the number of Russian citizens and Kremlin supporters from other countries who can no longer enter Ukraine to 1,228 from 682.