Estonia on Friday summoned the Russian Federation’s chargé d’affaires to protest a violation of its airspace, the Estonian Ministry of Foreign Affairs said.

Three Russian MIG-31 fighter jets entered Estonian airspace over the Gulf of Finland without permission and remained for approximately 12 minutes, officials said.

“Russia has already violated Estonia’s airspace four times this year, which in itself is unacceptable. But today’s incursion, involving three fighter aircraft entering our airspace, is unprecedentedly brazen,” Estonian Foreign Minister Margus Tsahkna said. 

“Russia’s increasingly extensive testing of boundaries and growing aggressiveness must be met with a swift increase in political and economic pressure,” he added

The incident follows heightened tensions on NATO’s eastern borders, with recent Russian drone breaches into its airspace, including Poland and Romania earlier in September. In response to these provocations, NATO launched Operation Eastern Sentry on September 12 to bolster defense along its eastern flank.