Poland scrambled fighter jets and an early warning aircraft, and put its ground air defenses and radar systems on "the highest state" of alert.

The strikes, which were the latest in Russia’s almost daily attacks on the Ukrainian power grid as bitter winter temperatures approach, killed at least six people, including a 7-year-old girl, according to authorities. Children between 2 and 16 years of age were among the 18 injured.

The onslaught led to power cuts in all regions of Ukraine as Russia seeks to disrupt electricity and heating supplies as winter approaches.

The Eastern Flank Defense Line envisions that in a future fight, NATO will blunt any Russian offensive with an unmanned zone of operations.

Two drones were spotted, and one was shot down. The incident occurred on October 17 but was only recently revealed. It comes amid demands for a more robust response to Russian incursions.

Russian Foreign Minister Sergei Lavrov said on Tuesday that Moscow is prepared to give NATO and EU countries a non-aggression guarantee, reiterating that Russia has no intention of attacking any of their current members.

NATO forces shot down a suspicious drone hovering around US military barracks in Estonia, it has emerged. The facility – Camp Reedo – is less than 30 miles from the Russian

Accurate, inexpensive drones are becoming ubiquitous instruments of war. If they are the new reality, then we have every interest in preventing them from becoming a new means to deliver nuclear weapons. Nuclear warheads on drones should be banned outright.

Russia believes some NATO members, in particular Poland, want to abandon restrictions on the deployment of nuclear weapons in their countries, which would aggravate “strategic risks” and tensions, Russian foreign ministry spokeswoman Maria Zakharova said.

Lithuania accuses Belarus and Russia of a "deliberate escalation of hybrid warfare" as balloons shut down major airport.