Three people with links to Russian military and intelligence sites travelled to stay near the airbases before the incidents, according to a separate report. One is said to have been just metres from the perimeter of Mildenhall when the drones were flying, the i said.

Most American soldiers lack the know-how for fighting with unmanned systems, and while the US has excelled at building large, expensive weaponry, it is in many ways unprepared to quickly produce large quantities of small,

The Danish defense ministry said Saturday that "drones have been observed at several of Danish defense facilities" overnight Friday into Saturday. The renewed drone sightings come after there were several drone sightings in the Nordic country earlier this week, with some of them temporarily shutting down Danish airports.