In his nightly video address on Tuesday, Zelensky said Ukraine does not threaten civilian aviation but that "there will simply be drones in Russia's skies on a scale that has to be taken into account." He directed the warning to airlines continuing to operate flights to Russian airports, especially in major cities like St Petersburg and Moscow.
Most Western commercial airlines already avoid Russian airspace as a consequence of Russia's ongoing invasion of Ukraine, but carriers from countries such as China continue to fly over Russia. Zelensky said the war started by Russia "is closing its skies."
Russian President Vladimir Putin responded by calling Zelensky's comments a "declaration of state terrorism" and said Russia would continue its own intensifying attacks on Ukraine.
Aviation risk advisory firm Osprey Flight Solutions said in an alert to clients that while the majority of Ukraine's drone and missile strikes are likely to occur within 300km (186 miles) of the border, daily attacks deeper inside Russia are almost certain to continue this year. The alert added there is "a realistic possibility that the frequency of Ukrainian strikes will continue to increase in the short term deep inside Russian territory," and that miscalculation or misidentification remains a risk.