A Russian fighter jet flew into NATO airspace on Wednesday, sparking an emergency response. Estonia's foreign minister Margus Tsahkna said the SU-30 jet entered Estonian airspace for around a minute near Vaindloo Island in the Gulf of Finland , off the country's northern coast. A furious protest over the airspace breach has been handed to Russia 's top diplomat in Tallinn, with the acting head summoned to account for the incident. The fighter jet did not have a flight plan and made no contact