The head of NATO says members need to increase their air and missile defenses by 400% to counter the threat from Russia and warns that Moscow could be ready to attack the military alliance within five years.

Nato needs a "quantum leap" in defence to deter threats to the alliance, its secretary general has said, as he called for Western allies to invest more in their armed forces. In a speech in London, Mark Rutte said Russia could be ready to use military force against Nato within five years.

Learn to speak Russian,” the secretary-general of the alliance warned nations unwilling to make politically unpopular budget decisions.