telegraph.co.uk:Ukraine has mobilized for war amid warnings from Nato that Russia’s annexation of Crimea “threatens peace and security in Europe”.

With tension nearing boiling point, Anders Fogh Rasmussen, the Nato Secretary General, vowed the organization would stand by Ukraine, a nation of 46 million which occupies a vital strategic position between Europe and Russia.

Speaking before he chaired an emergency meeting of ambassadors from the 28 Nato member states, he said: “Russia must stop its military activities and its threats.”

The United States dramatically intensified pressure on Moscow, threatening to remove Russia from the G8 club of developed economies.

John Kerry, the US Secretary of State, condemned Russia for what he called an “incredible act of aggression” and threatened “very serious repercussions”, including Russia’s possible expulsion from the G8.

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