New Delhi: Polish Prime Minister Donald Tusk announced on Wednesday (September 10) that they have shot down at least three drones entering from Belarus, while a fourth one was likely destroyed, DW reported.Tusk said that there were 19 intrusions into Polish airspace overnight, “many of them drones entering from Belarus that were shot down”.Tusk told the Polish parliament that NATO’s Airborne Early Warning and Control System (AWACS) had been put on alert after reports of a large Russian missile and drone attack on Ukraine late Tuesday. The first airspace breach occurred around 11:30 p.m. local time (2130 GMT/UTC) and continued until about 6:30 a.m, according to DW.Tusk stressed the incident was unprecedented: “This is the first time in this war that they did not come from Ukraine due to errors or minor Russian provocations. For the first time, a significant portion of the drones came directly from Belarus.” “The fact that these drones, which posed a security threat, were shot down changes the political situation. Therefore, allied consultations took the form of a formal request to activate Article 4 of the NATO Treaty,” Tusk said, as per the report.Article 4 of the NATO treaty is invoked when a member state feels threatened by another country or a terrorist organisation. Once it is invoked, the members start formal consultations at the request of the threatened member.Responding to the drone strikes, Ukrainian President Volodymyr Zelenskyy called for a common air defense system with European allies. He accused Russia of “deliberately targeting” Poland by sending drones through its airspace overnight.“Ukraine has long proposed to its partners the creation of a joint air defence system to ensure the guaranteed downing of ‘Shaheds,’ other drones, and missiles through the combined strength of our combat aviation and air defences,” Zelenskyy said on social media.Meanwhile, Poland has summoned a top Russian diplomat in Warsaw, Andrei Ordash, Moscow’s charge d’affaires, for a noon meeting. Ordash told Russian state news agency RIA Novosti that Warsaw had not yet presented evidence that the drones came from Russia.