Residents near RAF Fairford in Gloucestershire were advised to stay indoors on Saturday evening amid heightened security concerns preceding an alleged foiled bomb plot, law enforcement officials confirmed. The military airbase, frequently used by United States bombers, became the focus of a counter-terrorism investigation after arrests were made early Sunday.

Five British nationals in their twenties were detained on Sunday on suspicion of explosives offenses and later terrorism-related charges. Authorities are examining whether there is any connection between the plot and Iran. In the hours leading up to the arrests, local residents received limited information from armed police officers who instructed them to return home and avoid the vicinity of the base.

Messages circulated in a local WhatsApp group indicated that shortly before 6 p.m. on Saturday, residents were warned about intelligence suggesting an “imminent” attack, though no further details were provided. One resident described being stopped by armed officers and told to make their way home, with only a general warning to steer clear of the base. Another resident recounted unusual activity at the base shortly after midnight, noting that music, including the song “Piano Man” by Billy Joel, was playing from the airfield in the early hours of Sunday, along with other atypical sounds such as sirens and the American National Anthem.

A local woman reported seeing a "large group of hooded and masked men" in the vicinity, emerging from three vans in the early morning hours of September 27. She attempted to notify Ministry of Defence police but was unable to reach them and subsequently called emergency services at 1:36 a.m., recognizing the heightened security status of the base at that time.

Political figures have weighed in on the situation. Wes Streeting, a Member of Parliament, commented that the farmer who reported the suspicious activity had only “a partial picture” of events, emphasizing the complexity of the investigation.

Counter-Terrorism Policing (CTP) continues to coordinate the response, working alongside the Ministry of Defence and local agencies. Deputy Assistant Commissioner Vicki Evans described the operation as “hugely complex and large-scale,” highlighting ongoing efforts to advance the investigation and provide support to the local community. Investigators were active at the scene overnight as they pursue multiple new lines of inquiry, though authorities have yet to release additional details regarding the nature or specifics of the alleged plot.