Downing Street has insisted that British air bases are safe and that their security is a top priority, after US aircraft were moved from RAF Mildenhall.
Two American refuelling tankers were diverted from the site to Germany on Monday morning, while several other tankers were moved to various locations later in the day, according to the Wall Street Journal.
Threat remains under discussion
The exact nature of the threat is not known and remains under discussion among US officials, the newspaper reported.
Asked about any contact with the US regarding the safety of their planes, the Prime Minister's official spokesman said: "As you know, the US is one of our top security partners.
"We're in constant communication with them, sharing intelligence and accessing threats together.
"Aircraft and other assets move regularly according to operational requirements. It would be for the US to comment on those movements. Indeed, I think they've issued a statement.
"The protection of our bases, both in the UK and across the world, is a top priority."
Government maintains bases are safe
Asked whether the Government maintained that British bases were safe, the spokesman said: "Yes."
