The probe was launched after a squadron of what are believed to be drones were repeatedly spotted flying over sites in Feltwell in Norfolk and Mildenhall and Lakenheath in Suffolk.

Following the incident last month, which led to 60 British troops being deployed to help with the investigation, similar sightings have occurred at US airbases in Germany and numerous locations in the US, including in the states of New Jersey, Virginia and California. Flashing lights in the night sky were spotted by villagers living near RAF Feltwell in Norfolk (Image: Ricky Fletcher/Kels Manels) However,........

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