The Danish police earlier said they did not know who was behind the drones, but that evidence suggested it was a "capable actor," according to TRT World. The police that whoever was responsible for flying large drones over Copenhagen airport appeared to have been knowledgeable, as flights resumed in Denmark and Norway capitals following a night of travel chaos. All this together ... indicates that it is a capable actor. Which capable actor, I do not know." He said "several large drones" flew over the Copenhagen airport for more than three hours late on Monday.