Copenhagen: Denmark’s defence ministry said Sunday that it had again observed drones at several of its armed forces’ locations overnight, a day after the Nato alliance announced that it would enhance its vigilance in Baltic Sea region.The ministry said in a statement that it had “several capacities deployed” after drone sightings from Saturday into Sunday night. It didn’t offer any further details about the specifics of the deployment, the number of drones or locations. This is the latest unexplained drone activity after several sightings raised concerns about security in northern Europe amid suspected growing Russian aggression. As Denmark gears up for the upcoming EU summit in Copenhagen, Danish govt said Sunday that “civilian drone flying in its airspace will be prohibited” from Monday to Friday.