Multiple Russian drones crossed into Poland in what European officials described as a deliberate provocation, causing NATO to send fighter jets to shoot them down.

Poland is closing its border with Belarus on Thursday at midnight local time as a result of Russia-led military exercises taking place in Belarus, Prime Minister Donald Tusk said on Tuesday, amid escalating tensions between Minsk and Warsaw.

President Trump has repeatedly threatened to impose sanctions against Russia if it doesn't move toward a ceasefire or ending the war with Ukraine. But Russia is escalating its attacks.

Russia’s violation of Poland’s airspace with drones on Wednesday marks the most serious cross-border incident into a NATO member country since the war began.