Tallinn: US President Barack Obama arrived in Estonia on Wednesday ahead of the key alliance summit to be held in Wales which would focus on Ukraine.
Obama is due to hold talks with leaders of Estonia, Latvia and Lithuania in Tallinn and is likely to discuss Russia's intervention in Ukraine, the BBC reported.
The meeting comes ahead of the crucial NATO Summit which plans to set up a force in Ukraine to protect the European members from possible Russian aggression.
Meanwhile, Russia has declared NATO as a “major threat” and said that if NATO troops are deployed in Ukraine, then it will have a shift in its military doctrine.
NATO`s planned action at this week`s summit "is evidence of the desire of US and NATO leaders to continue their policy of aggravating tensions with Russia", Mikhail Popov, the deputy head of Russia`s National Security Council, told RIA-Novosti news agency in an interview, the AFP reported.
Since the troops would not be permanently based there, the alliance does not see it as breaching the terms of the 1997 NATO-Russia Founding Act which fixed Europe`s post-Cold War borders.
The idea of the expansion of NATO into former Soviet states, which started with the Baltic countries in 2004, continues to rankle with the Kremlin.
(With AFP Inputs)