Tusk flags ‘accidental’ Russian spillover strikes on NATO’s eastern flank

Key facts

• Tusk says NATO, Ukrainian and Polish intelligence assess Russia is likely to step up attacks in the next few months, including against allies such as Poland.
• He warns Russia could allow drones or missiles to enter NATO territory and then claim it was an accident to deter an Article 5-caliber response.
• Tusk expects fall and winter to be critical for Ukraine, with sustained strikes on cities and logistics, including western Ukraine near Poland, and increased use of jet-powered drones.

3 minute read

Polish Prime Minister Donald Tusk has warned that the coming fall and winter could see Russia intensify long-range strikes not only against Ukraine but also in ways that create plausible-deniable spillover onto NATO’s eastern flank, including Poland and the Baltic states. Speaking to Poland’s parliament, Tusk cited intelligence assessments from NATO, Ukraine and Poland indicating that the “most likely scenario for the next few months” is an escalation in Russian attacks aimed at weakening allied cohesion as much as degrading Ukrainian combat power.

The operational concern is not merely technical malfunction or navigational error, but a deliberate Russian messaging strategy: allow drones or missiles to enter allied airspace, cause damage, and then frame the event as accidental to deter escalation and fracture consensus on proportional response. Tusk argued this would be intended to make NATO’s collective defense guarantee appear uncertain in practice, building on a wider pattern of hybrid pressure—espionage and threshold-testing incidents—that probe what constitutes an “armed attack” under Article 5.

For European defense officials, the implication is that air and missile defense, air policing, and incident attribution will be tested under crisis conditions where political decision time is compressed and the adversary’s information operation is pre-baked. Tusk explicitly raised doubts about the political will in parts of the West to respond decisively on behalf of frontline allies, noting that some actors may seek an excuse to avoid commitments in a conflict scenario. This intersects with broader transatlantic uncertainty, including public statements by U.S. President Donald Trump casting doubt on collective defense, increasing Moscow’s incentive to experiment with calibrated risk and ambiguity.

Tusk also forecast a “tragically critical” period for Ukraine, with continuous high-intensity strikes on major cities and logistics enablers such as warehouses and rail infrastructure. He noted intensified attacks in western Ukraine near the Polish border and highlighted Russia’s increased use of jet-powered drones that Ukraine has struggled to intercept—an indicator that the air defense contest is shifting and that border-adjacent NATO states should anticipate higher rates of airspace incursions, debris fall, and misidentification risk during dense strike waves.

Source: Politico.eu