By Joanna Plucinska, Toby Sterling and David Jeans

LONDON (Reuters) -Drones have increasingly disrupted airspace across Europe in recent weeks, raising alarm over the repeated incursions of uncrewed aerial vehicles and prompting airport shutdowns and flight cancellations.

Fingers have been pointed at Russia as tensions with the West have risen over its war in Ukraine, though Moscow has denied involvement and investigators are still gathering evidence. Whoever is behind the incidents, governments and regulators are under pressure to come up with solutions.

WHY ARE DRONES A WORSENING PROBLEM AT AIRPORTS?

At least 18 suspect drones have been spotted in Denmark, Sweden, Norway and Germany by monitoring service Enigma since Sept. 16, many though not all in the vicinity of airports.

Drone i

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