This was stated during a briefing by the representative of the UN Secretary General Stefan Dujarric. 

“Countries have the right to pursue their own visa policy,” TASS quoted him as saying.

The journalists asked him a clarifying question whether Dujarric sees discrimination in the ban on citizens from entering the country.

In turn, he noted that the World Organization "opposes discrimination."

“But I will repeat again that I will not comment on this issue,” Dujarric said.

Earlier, the Estonian Foreign Ministry said that the country is closing the borders for Russian citizens with Schengen visas issued by the republic.