British police have arrested several men following a security incident near RAF Fairford in Gloucestershire.
The airbase is used by the US Air Force.
Police said the men were arrested on suspicion of offences under the Explosives Act.
Army bomb disposal experts were deployed as part of the response.
Nearby residents were evacuated while authorities assessed the situation.
Police described the incident as a major security operation.
Investigations were continuing on Sunday.
Authorities have not established a motive publicly.
