On the evening of 12 November, unauthorised drone activity was detected at the US base at RAF Lakenheath in the United Kingdom.
Reuters reports.
A US Air Force spokesperson said that personnel, aircraft and infrastructure were not harmed.
“We continue to work closely with our host-nation counterparts to ensure the safety of US service members, US civilians and host-nation civilians, contractors, as well as all our families,” the spokesperson added.
According to the outlet, in recent weeks the US has withdrawn bombers from the UK that were used for strikes on Iran, and moved large aerial refuelling tankers from the UK to Germany.
The bombers left RAF Fairford for security reasons after a group of men drove up to the base in white vans in the middle of the night.
Last month, two men were charged in connection with the incident, and prosecutors say one of them tried to help Iranian intelligence in the UK.