"I've just spoken with the Estonian PM Kristen Michal about the Russian airspace violation today," NATO chief Mark Rutte said on social media on September 19. Russia's Defense Ministry later denied its aircraft had violated Estonian airspace, saying the planes were on a "scheduled flight...in strict compliance with international airspace regulations." "At the time of the airspace violation, the fighter jets did not have two-way radio communication with Estonian air traffic control." But to be in Estonian airspace for such a long time is, of course, at least malice, if not a planned operation," Michal said. Zelenskyy Calls Airspace Violation 'Outrageous'Ukrainian President Volodymyr Zelenskyy condemned Russia for intensifying tensions after the jets violated Estonian airspace, calling the action "outrageous" and "destabilizing."