Obama lands in Estonia for talks on Ukraine

Dependence on Russian energy and presence of Russian minorties raises concerns for Baltic security

US President Barack Obama has arrived in Estonia on a visit apparently aimed at showing Washington's solidarity with the three Baltic states.

His arrival in Estonia comes one day before a NATO summit in Wales, where Russia's involvement in Ukraine is expected to be the main topic.

A high dependence on Russian energy and a presence of Russian minorities in the Baltic states could make them vulerable to attention from Moscow.

At the two-day summit in Wales, the Baltic states will press for some kind of deployment of NATO troops, in addition to increased air patrols already announced by the alliance this year.