The Danish prime minister has said the country was subjected to the “most serious attack on Danish critical infrastructure to date” after a drone incursion shut Copenhagen airport for several hours. “Therefore, I can only say that this is in my eyes a serious attack on Danish critical infrastructure.”She said the incursion was intended to “disrupt and create unrest. after newsletter promotionView image in fullscreen Police and members of the Danish security and intelligence service (PET) inspect an area near Copenhagen airport on Tuesday after the drone sightings. Jens Jespersen, a Danish police chief superintendent, said of the airport drone incident: “We have concluded that this was what we would call a capable operator. “We have seen Russia launch drones from shadow fleet ships before,” Kaarsbo said, citing a recent incident in German waters.