19–23 Russian drones enter Polish airspace (NATO Art. 4 invoked)

On the night of 9 to 10 September 2025, a large number of drones crossed into Polish airspace while Russia was conducting a wave of strikes against Ukraine. Polish and allied officials attributed the drones to Russia, with reporting indicating that many had entered via Belarus. Estimates of the number that violated Polish airspace varied, with figures of around 19 to 23 cited in different accounts. Polish authorities later identified at least some of the objects as Gerbera-type drones, a Russian variant of the Iranian-designed Shahed, described as unarmed.

The incursion triggered an immediate military response. Polish F-16s flew alongside allied aircraft, including Dutch F-35 fighters, Italian airborne early-warning planes and a NATO aerial tanker, and several drones were shot down. NATO and Polish accounts described this as the first time alliance aircraft had fired in such circumstances since Russia's full-scale invasion of Ukraine in 2022. Multiple airports were temporarily closed during the operation, among them Warsaw Chopin, Warsaw Modlin, Lublin and Rzeszow-Jasionka, before reopening with delays.

Poland requested consultations under Article 4 of the North Atlantic Treaty, bringing the matter before the North Atlantic Council. Prime Minister Donald Tusk called the episode a large-scale provocation, as NPR reported, while Russia's defence ministry said it had struck targets in Ukraine and that no targets in Poland had been planned. Reuters reported the downing of drones and the Article 4 invocation as an unprecedented violation of allied airspace.

The core facts are well established: drones attributed to Russia entered Polish airspace, several were shot down by Polish and allied aircraft, airports were closed, and Poland invoked NATO Article 4. What remains contested is intent. Polish and many allied officials treated the incursion as deliberate aggression, while Russia denied targeting Poland and pointed to range limits, leaving open the possibility of spillover or navigation failure. Either way, it marked the first NATO use of weapons against incoming objects over allied territory since 2022 and a significant escalation in pressure on the alliance's eastern flank.