Russia will deploy new missiles aimed at U.S.  missile defense sites in Europe if Washington goes ahead with a planned shield despite Russia's concerns, President Dmitry Medvedev said Wednesday.

Russia will station missiles in its westernmost Kaliningrad region and other areas if Russia and NATO fail to reach a deal on the U.S.-led missile defense plans, he said in a tough statement that seemed to be aimed at rallying domestic support.

Russia considers the plans for missile shields in Europe, including in Romania and Poland, to be a threat to its nuclear forces, but the Obama administration insists they are meant to fend off a potential threat from Iran.

Moscow has agreed to consider NATO's proposal last fall to cooperate on the missile shield, but the talks have been deadlocked over how the system should operate. Russia has insisted that the system should be run jointly, which NATO has rejected.