British Prime Minister David Cameron has sent a letter to leaders of Nato member-states, saying that the body should reconsider its policy towards Russia in response to Russia's line on Ukraine.
The head of the British cabinet stresses that Russia has violated all international laws by annexing Crimea. Moreover, the country is trying to increase tensions in Eastern Ukraine by providing the rebels with arms, he claims.
According to Prime Minister Cameron, Nato should respond to Russia's unfriendly moves.
