NATO is sending troops to the Russian borders, said Deputy Security Council Secretary of Russian Federation Mikhail Popov. He said that the size of the contingent of the alliance of rapid reaction in two years has increased from 25 to 40 thousand people.
No evidence provided. This disinformation message is consistent with recurring pro-Kremlin narratives about the belligerent West attempting to encircle and weaken Russia.
According to the official website, "the Alliance has deployed four battle-groups to Poland and the Baltic States and additional multinational brigades to Romania. NATO’s Readiness Action Plan bolsters the number of forces deployable in an emergency to over 40,000 and establishes a spearhead Very High Readiness Joint Task Force which is positioned to deploy a 5,000-man brigade anywhere in the Alliance in 2 to 7 days".
NATO is not a threat to Russia. NATO's official policy towards Russia was most recently articulated by the heads of state and government of the Alliance at the Warsaw Summit in July 2016. They stated that "the Alliance does not seek confrontation and poses no threat to Russia. But we cannot and will not compromise on the principles on which our Alliance and security in Europe and North America rest".
NATO is not encircling Russia. Russia's land border is just over 20,000 kilometres long. Of that, less than one-sixteenth (1,215 kilometres), is shared with NATO members. Russia has land borders with 14 countries. Only five of them are NATO members.