NATO condemns Russian airspace violations in Estonia, warns of robust response

NATO issued a stern warning to Russia on Tuesday (23 September), stating it would deploy “all necessary military and non-military tools” to defend alliance territory following a violation of Estonian airspace by three Russian MiG-31 fighter jets.

The alliance described the incursion as part of a “wider pattern of increasingly irresponsible Russian behaviour” that risks miscalculation and endangers lives, emphasizing that Moscow bears full responsibility and must cease such actions immediately.

The statement emerged from an urgent meeting of the North Atlantic Council (NAC)—NATO’s principal decision-making body, comprising ambassadors from all 32 member states – convened at Estonia’s request under Article 4 of the Washington Treaty. This provision allows consultations when a member’s territorial integrity, political independence, or security is perceived as threatened.

It marked only the ninth invocation of Article 4 in NATO’s 76-year history and the second in two weeks, following a similar consultation on September 10 after Russian drones violated Polish airspace. The Estonian incident occurred on 19 September, with the jets penetrating 10 kilometres into Estonian territory for about 12 minutes before being intercepted and escorted out by Italian NATO fighter jets scrambled from nearby bases.

NATO Secretary General Mark Rutte, speaking at alliance headquarters in Brussels after the meeting, underscored that the alliance remains a “defensive” entity but is “not naive” about escalating threats.

“If it is not intentional, then it is blatantly incompetent. And of course, even if it is incompetence, we still have to defend ourselves,” Rutte said. He noted that NATO commanders retain authority to make the “ultimate decision” in real time, including shooting down intruding aircraft if they pose an immediate threat – though the Estonian jets were assessed as non-threatening.

Rutte added that NATO would respond to future provocations “in a manner, timing, and domain of our choosing,” in line with international law, while reaffirming unwavering support for Ukraine’s right to self-defense against Russia’s “brutal and unprovoked war of aggression.”

U.S. President Donald Trump, speaking to reporters on the sidelines of the United Nations General Assembly in New York, voiced strong support for a firm NATO stance. Asked if alliance members should shoot down Russian aircraft entering their airspace, Trump replied unequivocally: “Yes, I do.” Pentagon chief Pete Hegseth echoed this during a call with Estonian Defence Minister Hanno Pevkur, affirming that Washington “stands with all NATO allies and that any incursion into NATO airspace is unacceptable.”

The NAC discussions focused squarely on the Estonian fighter jet violation and related patterns of Russian activity, including recent drone incursions over Poland (where 19 Russian drones penetrated airspace on 9-10 September) and Romania (a Geran drone detected for nearly an hour on 13 September). NATO also highlighted similar incidents reported by Finland, Latvia, Lithuania, and Romania.

Estonia reports “unprecedentedly brazen” airspace incursion by Russian jets

However, the meeting did not address the separate drone sightings that disrupted operations at Copenhagen Airport in Denmark and Oslo Airport in Norway on 22 September – even though both nations are NATO members. NATO officials, including Rutte, indicated it was “too early to say” whether these events were linked to Russian actions, pending ongoing investigations.

In Denmark, Prime Minister Mette Frederiksen labelled the Copenhagen incident the “most serious attack on Danish critical infrastructure to date,” describing it as a deliberate effort “to disrupt and create unrest.”

Two or three large drones, approaching from different directions and intermittently flashing lights, hovered near the airport late Monday, forcing a nearly four-hour shutdown of take-offs and landings and stranding tens of thousands of passengers.

Danish police Chief Superintendent Jens Jespersen suggested the drones could have been launched from ships in the nearby Baltic Sea shipping lane, with a Royal Danish Navy vessel patrolling the area Tuesday morning. Frederiksen linked the event to a broader wave of suspected hybrid threats across Europe, citing the Polish and Romanian drone incursions, the Estonian jet violation, and recent cyberattacks on airports – while not ruling out Russian involvement.

“I certainly cannot deny in any way that it is Russia,” she told broadcaster DR.

Ukraine’s President Volodymyr Zelenskyy echoed suspicions of Moscow’s role in a post on X, though without evidence. Russia’s ambassador to Denmark, Vladimir Barbin, dismissed the claims as “unfounded” and provocative, aimed at escalating tensions toward direct confrontation.

Norway faced a parallel disruption, with a drone sighting prompting a three-hour closure of Oslo Airport’s airspace, also stranding thousands. Norwegian Prime Minister Jonas Gahr Støre noted that Russia had violated Norwegian airspace three times earlier in 2025 (in April, July, and August), describing them as smaller in scope than incidents in Estonia, Poland, and Romania but “not acceptable” regardless of intent.

The Norwegian security police (PST) described the situation as “still unclear” and maintained routine contacts with national and international partners, without confirming links to the Danish event.

With Reuters, edited by g.g.

Caption: North Atlantic Treaty Organization (NATO) Secretary General Mark Rutte gives a press conference following a meeting of NATO ambassadors to discuss Russia’s violation of Estonian airspace, at the NATO Headquarters in Brussels, Belgium, 23 September 2025. NATO ambassadors discussed Russia’s violation of Estonian airspace by three MiG-31 fighter jets on 19 September, after Estonia invoked Article 4 to request emergency consultations on the Alliance’s response. EPA/OLIVIER HOSLET