MOSCOW, April 28 (RAPSI) - Russian telecom regulator, Roskomnadzor, has blocked the access to more than ten Ukrainian websites containing calls for mass riots in Russia, the Siberian Federal District Department of Russia’s Prosecutor General's Office reported.

Earlier, Roskomnadzor restricted access to 13 groups within Russia's largest social network Vkontakte. According to the Prosecutor General's Office, these groups promoted the Ukrainian nationalist cells, and called for terrorist activities on Russian territory.

On February 1, Russia's communication watchdog Roskomnadzor started blocking websites deemed to incite extremism without a prior court ruling. The decision to blacklist the website may be taken by the watchdog at the request of the Prosecutor General or his deputies, according to the recently passed amendments aimed at toughening the consequences for the crimes of extremism and inciting hatred or enmity.

In 2013, more than 14,000 online resources have been blacklisted in the year that has passed since the activation of Roskomnadzor's website blacklist.