By Elizabeth Culliford (Reuters) -Russia is blocking Meta Platforms Inc’s Facebook, the country’s communications regulator said on Friday, in response to what it said were restrictions of access to Russian media on the platform. The regulator, Roskomnadzor, said there had been 26 cases of discrimination against Russian media by Facebook since October 2020, including restrictions in recent days on state-backed channels like RT and the RIA news agency. The move is a major escalation in an ongoing confrontation between big tech companies and Russia, which has in recent years issued a slew of fine…