Drone flights that caused Danish airports to close on two nights this week were a systematic and hybrid operation by a “professional actor,” the defence minister said on Thursday. “There can be no doubt that everything points to this being the work of a professional actor when we are talking about such a systematic operation in so many locations at virtually the same time. This is what I would define as a hybrid attack using different types of drones,” Troels Lund Poulsen told a press conference. (AFP)