The US air force has said it responded to “suspected unauthorised drone activity” on Friday night at an airbase in the east of England .
No personnel, aircraft or infrastructure were affected, the air force said.
Sirens were heard at RAF Lakenheath in Suffolk, one of several airbases in the UK used by the US military .
The force added: “We continue to work closely with our host nation counterparts to ensure the safety and security of our US service members, US and host nation civilians, contractors and all of our families.
“Protecting our shared community is a joint responsibility, and we encourage everyone to support this effort by reporting any unusual or suspicious activity to local authorities.”
The MP for West Suffolk , Nick Timothy, said the authorities at the base had told him “there is no threat to the public, and the incident is now resolved”.
He added: “Given the raised threat level, I continue to encourage everyone to report anything suspicious or out of the ordinary to the authorities.”
