Tajikistan's communications service has ordered providers to block access to 131 websites, including social network sites.
The service gave instructions late on December 21 to block the sites, mainly those posting music and videos but also Russian social network sites such as Vkontakte and Odnoklassniki.
The Twitter website was also ordered blocked, as was topvideo.tj, the Tajik version of YouTube.
Reports said Facebook, which was blocked at the end of November, was not on the list of sites to be blocked.
Russia's Interfax news agency cited a "representative of [Internet] providers as saying the sites would probably not be blocked until December 24.
Based on reporting by Asia-Plus and Kommersant.ru