"Contrary to all the existing agreements regulating the protection of state borders of the two countries and the procedure of their crossing, the Russian side decided to establish a border zone on the border with Belarus without prior notice," Vanshina told reporters.
She added that the document went out of line with the principle of open borders between Russia and Belarus, who are both part of a Union State.
"I do not think we should now dramatize the situation. We are analyzing the document," Vanshina said.
Belarus' State Border Committee said Thursday that Moscow's decision was Russia's domestic affair.