US Air Force says drones spotted over its military bases in England

FILE PHOTO: British police stand guard at the entrance to the US Air Force base at RAF Mildenhall, Suffolk, Britain December 18, 2017. REUTERS/Chris Radburn/File Photo

LONDON/WASHINGTON (Reuters) -A number of unidentified drones have been spotted over three United States Air Force bases in England over the last six days, U.S. officials said on Tuesday.

"Small unmanned aerial systems were spotted in the vicinity of and over RAF Lakenheath, RAF Mildenhall, and RAF Feltwell from Nov 20 to Nov 26," a spokesperson said in an emailed response to Reuters.