Russia’s communications watchdog Roskomnadzor said it had blocked access to the Viber messaging app, the latest in a line of social media services to be banned by Russian authorities, Report informs via Reuters.

In a statement, Roskomnadzor said the block was related to a violation of rules concerning the prevention of terrorism, extremism, and drug dealing.

Hiroshi Mikitani, the founder and chief executive of Rakuten Group, which owns Viber, had touted the messenging app as a way to counter what he called Russian propaganda.