Drones spotted in Bulgaria and Germany raise concerns about Russian escalationA drone has exploded in Bulgaria near the Trans-Balkan gas pipeline, the latest in a surge of unidentified unmanned aerial vehicles flying into European territory as regional tensions escalate due to Russia’s ongoing war in Ukraine. We can say with certainty that the Ukrainian Armed Forces did not intentionally direct any assets toward Bulgaria,” Ministry of Foreign Affairs spokesman Heorhii Tykhyi said. Bulgarian authorities have since increased surveillance and said troops would be redeployed to border areas to detect drones and employ drone countermeasures. The drone incidents across the continent have revived concerns about Moscow’s war on Ukraine entangling neighbouring NATO states. Last month, after a suspected Russian drone was spotted over NATO member Romania’s airspace, the European Commission said it showed Russia’s war had “crossed yet another line”.