Finland warns of an increased risk of environmental disaster due to the fleet of Russian "ghost tankers" transporting oil through the Baltic Sea in violation of sanctions: about 100,000 tons of crude oil passes through the Gulf of Finland every week.
Swedish and German fighter jets intercept a Russian reconnaissance plane off the Swedish coast after it entered the flight information zone southeast of Blekinge.
German fighter jets intercepted a Russian spy plane flying without a transponder over the Baltic Sea on April 6.
German and French fighter jets were scrambled and escorted a Russian military aircraft near their borders without incident as part of NATO air patrol missions.
Germany scrambles fighter jet to intercept Russian reconnaissance aircraft spotted over the Baltic Sea off its coast.