Ukraine-Russia war latest: Nato jets scrambled to shoot down foreign drone after it enters Latvian airspace

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Finland, which also shares a border with Russia, imposed a temporarily restricted area for aviation and maritime traffic.

At the top of those concerns are the hybrid actions, particularly serious ones, attributed to Moscow in recent weeks, such as the attempted attack on a Ukrainian military transport plane at Leipzig Airport, eastern Germany, on August 5, using a kamikaze drone.