Russia has raised the idea of moving new missile forces to Kaliningrad, close to Poland and Lithuania.
First Deputy Prime Minister Sergei Ivanov linked the possible move to US plans for a missile defence system in Poland and the Czech Republic.
Russia has already threatened to hit back by targeting missiles at Europe.
Mr Ivanov said there would be no need to move extra forces to Kaliningrad if the US agreed to use Russian facilities instead of the Polish and Czech bases.
Russia says the US plans for a limited missile defence shield, including bases close to Russia’s borders, represent a threat to its security.
If our proposals are not accepted… an asymmetrical and effective response has been found
First deputy prime minister
It has proposed that the US should use a radar facility in Azerbaijan, and another installation currently being built in southern Russia.
US President George W Bush has described the idea as “innovative” but indicated that the US will press ahead with the plans for a radar station in the Czech Republic, and a missile base in Poland.
The US says its missile shield is not directed at Russia, but at what it considers “rogue states” such as Iran.
Russia has refused to extradite Litvinenko suspect. Whatever MSM say, it’s true there is a principle of International Law which forbids an State to give away nationals, whatever the crime they have committed.