The Danish defence ministry said it deployed ‘several capacities’ after sightings from Saturday into Sunday. While it is not clear who is behind the drone activity, Denmark’s prime minister and Nato’s secretary-general said last week that Russian involvement could not be ruled out. It is yet another example of unexplained drone activity after several incidents last week, including over five Danish airports. Today, flights were diverted from an airport on the Spanish island of Fuerteventura following drone activity. Norway is investigating drone sightings near its Oerland air force base while France has increased security following sightings above its Mourmelon-le-Grand base.