Russia has suspended traffic through several railway border crossings with Finland, Estonia and Latvia starting from Wednesday, Moscow said.
The Kremlin's order released on Tuesday did not provide a reason for the closures.
The statement mentions only a "temporary suspension" of the movement of people, vehicles, goods and cargo through selected railway crossings along sections of the Russian state border.
Russia's Foreign Ministry was instructed to notify Finland, Estonia and Latvia of the decision.
The largest number of closures will affect the Finnish border, including the Vyborg, Vartsilya, Lyuttya, Saint Petersburg-Finlandsky and Svetogorsk railway checkpoints.
