Denmark said drones that halted flights at its main airport on Monday were the most serious attack yet on its critical infrastructure and linked them to a series of suspected Russian drone incursions and other disruptions across Europe. Sightings of two or three large drones near Copenhagen airport late on Monday halted all take-offs and landings for nearly four hours. Authorities in Norway also shut the airspace at Oslo airport for three hours after a drone was seen. Danish police declined to comment on a post on X by Ukraine’s President Volodymyr Zelenskiy, without providing evidence, that Russia was behind the Copenhagen airspace violation. “The incident in the sky above Copenhagen Airport reveals a clear desire to provoke NATO countries into a direct military confrontation with Russia,” he said.