Estonia has invoked NATO"s Article 4 following a breach of its airspace by Russian fighter jets, according to a statement from the country"s Prime Minister. This incident occurred on the morning of September 19, 2025, when three Russian MiG-31 fighter jets entered Estonian airspace.
NATO fighters responded to the situation, forcing the Russian planes to flee. The Estonian government has deemed this violation of airspace as "totally unacceptable" and has decided to request consultations under NATO Article 4.
Article 4 of the NATO treaty allows member states to consult with each other when they perceive a threat to their territorial integrity, political independence, or security. This incident adds to ongoing tensions in the region, reflecting a pattern of similar situations involving Russian military activity near NATO member countries.
For further context on regional military activities, see recent developments in military engagements over the Baltic Sea.
Image for Estonia invokes NATO Article 4 after Russian jets breach airspace
