“Off with Roskomnadzor,” party chairman Sergei Boiko said at the start of the meeting, referring to the state regulator that had blacklisted more than 14 million IP addresses in an effort to block Telegram.

Opposition leader Alexei Navalny was allowed in after a brief encounter with police officers who, according to his spokeswoman, attempted to serve him a warning against holding his own anti-inauguration rally on March 5.