Russian defence ministry official General Yuri Yakubov has said that Russia will retaliate if the US places tanks and heavy weapons in NATO countries bordering Russia.
According to the Independent, the official said that the US government's plan to place weapons on its doorsteps will be the "most aggressive" step by the Pentagon since the cold war.
Yakubov said that Russia will build up its forces on the western strategic front in retaliation.
He said that Russia's response could include delivering missiles to the Russian exclave of Kaliningrad between Poland and Lithuania.