The authorities, including Russia's Federal Security Service (FSB), argued that terrorist plot attacks on the app that boasts 200 million users.
Russian Federation implemented strict anti-terrorism laws in 2016, which required messaging services to provide authorities with the ability to decrypt messages.
Smolina said that Telegram should be blocked immediately despite rules under which Russian court decisions normally come into effect after appeals are exhausted. The ban extends to the Telegram messenger, the Telegram app for smartphones, and Telegram's web client.More news: Broncos To Release CJ Anderson
Interfax cited Alexander Zharov, the head of Roskomnadzor, as saying that it would take several hours to complete the operation to block access to the app. "We believe the ban is anti-constitutional and will continue to defend the right of Russians to private messaging", Durov, who left Russia in 2014 and is now based in Dubai, said.
Life quality of 15 million Russians will get worse, as Telegram may become unavailable without a VPN from time to time.
Telegram representatives insist that handing over of the encryption keys is technically impossible.More news: Boston marks fifth year anniversary of marathon bombings
On April 13, the court in Moscow ruled to satisfy the lawsuit of Federal Service for Supervision of Communications, Information Technology and Mass Media or Roskomnadzor and block Telegram in the territory of Russian Federation.
Roskomnadzor said in a statement on April 16 that it had notified Internet providers that they must "restrict access" to Telegram as a result of the April 13 ruling. Durov has long said he will reject any attempt by the country's security services to gain backdoor access to the app.More news: Two Pak soldiers martyred in Afghan border clash