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.

NATO Secretary General Mark Rutte said members of the military alliance need to deliver a “quantum leap” in their collective defense amid the ongoing threat from Russia.