London: Poland scrambled fighter jets to shoot down drones that crossed into its territory in what it called an “act of aggression” during a Russian attack on Ukraine, marking a dangerous escalation of the war in Europe.

NATO air defences were mobilised and major airports grounded flights as Polish authorities restricted airspace to intercept the drones, leading the Polish government to invoke the NATO security pact and call for urgent talks with allies.

“During today’s attack by the Russian Federation targeting objects on the territory of Ukraine, our airspace was repeatedly violated by drone-type objects,” Poland’s military said in a statement.

“This is an act of aggression that posed a real threat to the safety of our citizens.”

Polish Prime Minister Donald Tusk told parliament the

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