Denmark on Thursday said drone flights over its airports this week were part of "hybrid attacks" to create fear, adding it would acquire new capabilities to intercept such aircraft, as Russia denied involvement.

Police said drones flew over several airports across the country and caused one of them to close for hours, after a similar incident early this week prompted Copenhagen airport to shut down.

That followed a similar incident in Norway, drone incursions in Polish and Romanian territory, and the violation of Estonian airspace by Russian fighter jets, which raised tensions in light of Russia's ongoing invasion of Ukraine.

"Over recent days, Denmark has been the victim of hybrid attacks," Prime Minister Mette Frederiksen said in a video message on social media -- referring to a novel

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