The Russian Il-20 did not file a flight plan for its "reconnaissance mission" in international airspace, Poland's military said.

NATO and U.S. allies try to assuage fears over bolstering Russia as the Pentagon announces a U.S. troop reduction in eastern Europe.

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.

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

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

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

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.

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

Spanish NATO jets were scrambled after two Russian aircraft reportedly violated Lithuanian airspace, escalating tensions amid the ongoing war in Ukraine.

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