In an exclusive interview with USA TODAY, U.S. Ambassador to NATO Matt Whitaker said allies must prepare in case Russia's Vladimir Putin attacks.

Russia has for years targeted NATO with hybrid attacks, including disinformation and sabotage campaigns, officials say.

European Commission President Ursula von der Leyen proposed a new security strategy to complement NATO's Article 4, aimed at countering Russian hybrid attacks.

The EU condemned Russia for the reckless firing of flares at a Danish frigate, escalating tensions over the Ukraine-Russia conflict.

A growing number of suspected Russian shadow fleet ships regularly ply waters near Ireland that hold many crucial undersea cables.

NATO military jets have been scrambled to shoot down a drone in Lithuania, the country’s National Crisis Management Centre said. Local reports said the drone had entered the country from

Four Russian ships, including sanctioned cargo and tanker vessels escorted by a destroyer, entered the Mediterranean via Gibraltar on 27 August, ending the first interruption of Russia's naval presence there since 2013.

Ukraine-Russia war latest: Poland scrambles jets as Putin attacks Kyiv with jet-powered drones - Major Russian attack comes as Nato fighter jets shot down a drone in Lithuania shortly after midnight