Romania's foreign ministry summoned Russia's ambassador on Sunday after the country's armed forces shot down a third drone in as many days, the latest in a sustained pattern of aerial incursions into NATO territory along the Ukrainian border.
The Romanian military confirmed the intercept without specifying the drone's origin, though the operational context requires no elaboration. Russian drone strikes on Ukrainian infrastructure have routinely produced debris and redirected munitions that cross into Romanian airspace. The distinction between deliberate incursion and navigational overspill has not been resolved by the available record. The pattern, however, is consistent.
Bucharest's decision to summon the ambassador is the prescribed diplomatic response. It is also, on the evidence of the preceding two years, an instrument with a documented ceiling. Three intercepts since Friday represent an escalation in frequency. The formal protest mechanism has not altered the underlying rate.
Romania joined NATO in 2004. Article 5 collective defense obligations apply. The Alliance's posture on low-altitude drone incursions into member-state airspace remains, as of this publication, calibrated below the threshold of a formal Article 5 invocation. That calibration is noted for the record.