BBC: President Dmitri Medvedev has accused the West of trying to push Russia behind a new "Iron Curtain".
"This is not our path. For us there is no sense going back to the past," the Russian leader said in Moscow.
He also blamed Nato for provoking last month's fighting between Russia and Georgia over South Ossetia.
His comments come a day after US Secretary of State Condoleezza Rice said Russia was becoming increasingly aggressive abroad.
In a strongly-worded speech, Ms Rice said Moscow was on a "one-way path to isolation and irrelevance".
Diplomatic relations between the US and its European allies, on one side, and Russia on the other, have been strained by the Georgian conflict.
Lambasting Nato
"We are in effect being pushed down a path that is founded not on fully-fledged, civilised partnership with other countries, but on autonomous development, behind thick walls, behind an Iron Curtain," President Medvedev said. Russia Warns of New Iron Curtain >>> | September 19, 2008
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