The U.S.-proposed European missile shield will eventually spread along Russia's borders and may neutralize Russia's nuclear potential by 2012-2015, a Russian political analyst said on Wednesday.

Commenting on reports that the United States and Lithuania were formally discussing deploying elements of the U.S. missile shield in the ex-Soviet Baltic state should Warsaw reject Washington's plans to station 10 interceptor missiles in Poland, Leonid Ivashov, the head of the Moscow-based Academy of Geopolitical Sciences, said: "We should expect that elements of a U.S. missile shield will be placed not only in Lithuania, but also in all territories bordering Russia and controlled by NATO."

So far, the Czech Republic has agreed to host an early-warning radar on its territory. Poland earlier had taken a tough stance in missile talks with the U.S., demanding that Washington upgrade its air defense systems in return, though now the agreement has been inked.

Ivashov said the main purpose of the U.S. global missile shield was to neutralize Russia's nuclear potential by 2012-2015 and that NATO eastward expansion was part of this plan.

He said Ukraine's and Georgia's possible accession to NATO would have dire consequences for Russia's defense capability.

"There is no doubt that elements of the U.S. missile shield will be placed in Georgia and Ukraine immediately after they join NATO," the analyst said, adding that Ukraine already had radars [in Mukachevo and Sevastopol] that may be used against Russia.

"The U.S. wants to create an impenetrable shield capable of intercepting and destroying Russian nuclear missiles on launch pads, in the initial trajectory, in orbit and on the final trajectory," he said.

Ivashov criticized the Russian leadership for "wasting time in empty rhetoric with the West," rather than taking concrete steps to counter the looming threat.

He suggested that Russia should threaten to sever all relations with NATO if the U.S. missile shield is eventually placed in Europe.

"Russia must also warn the European countries that...in case of a potential military confrontation...capitals, large cities, industrial and communications centers of the countries hosting elements of the U.S. missile shield will inevitably become the primary targets of [Russian] nuclear strikes."