Estonia has invoked NATO"s Article 4 following a breach of its airspace by Russian fighter jets, according to 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 incursion, forcing the Russian aircraft to flee. The Estonian government has deemed this violation "totally unacceptable" and has decided to request consultations under NATO Article 4.
This situation follows a pattern of increased military activity in the region, as seen in recent developments involving Russian jets in the Baltic Sea. The invocation of Article 4 indicates Estonia"s concern for its national security and its reliance on NATO for collective defense.
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