Estonia has said Russia violated its airspace with the incursion of three supersonic fighter jets amid heightened fears that Moscow's war with Ukraine could spill over into Europe's eastern flank. Foreign Minister Margus Tsahkna said on Friday that three MiG-31s entered Estonian airspace over the Gulf of Finland in the north for a total of 12 minutes, adding that he had summoned the charge d'affaires at the Russian embassy over the violation.