A SWARM of unidentified droneshave been spotted flying over three separate RAF airbases, the US Air Force has said. The fleet of “unmanned aerial devices” were seen over a £40m RAF

A spokesperson for the United States Air Force said in a statement following the incursions that the drones "fluctuated and they ranged in size [and] configuration"

The British Ministry of Defence is taking the ‘threat seriously’ after a number of unidentified drones were spotted over three US airbases in Britain. “Small unmanned aerial systems” were spotted over RAF Lakenheath and RAF Mildenhall, in Suffolk, and RAF Feltwell, in Norfolk between November 20 and 22.

Between November 20 and November 22, unidentified drones were observed flying over three American Air Force facilities in Britain, raising questions about aviation security. No imminent threat was established,

A number of unidentified drones have been spotted over three airbases in Britain, the United States Air Force (USAF) has confirmed. The incidents, which occurred between Wednesday and Friday, saw "small unmanned aerial systems" spotted over RAF Lakenheath and RAF Mildenhall,

Unidentified drones have been spotted over three US airbases in Britain, the United States Air Force (USAF) has confirmed. The sightings between 20 and 22 November were of a number of “small unmanned aerial systems” over RAF Lakenheath and RAF Mildenhall,

Drones have been spotted over three airbases in Britain this week - and it's not yet clear if they were hostile.

The United States Air Force, which uses the bases, said it was unclear at this stage whether the drones were considered hostile.