British counter-terrorism police have arrested a dual British-Iranian national in connection with a major security investigation surrounding RAF Fairford, a military airbase in Gloucestershire used by the United States for operations in the Middle East.
The arrest on Thursday, October 1, represents the latest development in an investigation that began after suspicious activity was reported near the base on September 27. Five other men were arrested earlier in the week and remain under investigation after being released on police bail.
The case has attracted international attention because RAF Fairford has been used by U.S. military aircraft during operations against Iran. British authorities are examining several possible explanations for the incident, including whether a foreign state may have been involved.
Dual UK-Iranian national arrested in London
Counter Terrorism Policing said the latest suspect is a 27-year-old dual UK-Iranian national who was arrested in Westminster, London, on suspicion of preparing terrorist acts under Section 5 of the Terrorism Act 2006.
Police also questioned a second man, a 26-year-old British national, under caution and conducted searches at two properties in Westminster.
The arrest makes him the sixth person taken into custody as part of the wider RAF Fairford investigation.
Reuters reported the arrest as part of an investigation into a suspected plot involving the airbase. The news agency also reported that British and U.S. authorities have been working together as investigators attempt to determine what happened and whether there was an organized plan behind the activity.
There have been varying reports about the suspect’s age, with some early reports identifying him as 25. The latest statement from Britain’s Counter Terrorism Policing gives his age as 27.
Investigation began after suspicious vehicles were reported
The investigation began Sunday, September 27, after authorities received reports concerning suspicious activity close to RAF Fairford.
Five British men in their 20s were subsequently arrested near the base on suspicion of terrorism and explosives-related offenses. Authorities examined three vans associated with the suspects.
Police and military bomb-disposal specialists searched the vehicles but did not find explosive devices. Investigators did, however, find a quantity of petrol, according to reports.
The incident resulted in evacuations in the nearby area as armed police and bomb-disposal teams established a security cordon.
The five original suspects have since been released on police bail but remain under investigation.
Possible Iranian connection remains under investigation
One of the most significant questions surrounding the case is whether Iran played a role.
British Prime Minister Andy Burnham has said there are “strong indications” that Iran was involved in the incident, although authorities have not publicly released evidence establishing such a connection.
Counter Terrorism Policing has been more cautious, saying investigators are examining all possible angles, including possible foreign-state involvement.
That distinction is important: police have not publicly confirmed that the incident was directed by the Iranian government.
Iran has denied involvement and has rejected the British allegations. Tehran has also objected to the use of British territory and military facilities in operations against Iran.
Why RAF Fairford matters
RAF Fairford is a strategically significant British airbase that has long been used by U.S. military aircraft.
Its importance has increased amid the conflict involving Iran because American bombers have operated from the facility during military operations against Iranian targets.
That connection has raised the security stakes surrounding the investigation.
U.S. Secretary of State Marco Rubio previously said there were indications that a foreign actor was involved in the earlier incident, while President Donald Trump also publicly commented on the arrests and the decision to release the original suspects on bail.
British officials, meanwhile, have emphasized that the investigation remains active and complex.
Reaction from British authorities
Vicki Evans, the senior national coordinator for Counter Terrorism Policing, said investigators were pursuing multiple lines of inquiry.
She described the investigation as “hugely complex” and reiterated that authorities were examining possible foreign-state involvement.
British officials have also sought to reassure residents that the investigation is being handled under close counter-terrorism coordination.
The original incident triggered a substantial emergency response, including armed officers, bomb-disposal specialists and evacuations around the Gloucestershire site.
Effects on UK-U.S. security cooperation
The investigation comes at a sensitive moment in British-American relations and could increase attention on the security of U.S. military facilities located in Britain.
RAF Fairford’s use by American forces means that an attack or attempted attack against the installation could have implications beyond British domestic security.
It also highlights the difficulties facing European governments as tensions involving Iran increasingly intersect with domestic counter-terrorism concerns.
British authorities have previously warned about activity connected to hostile states and their proxies on UK territory. The RAF Fairford investigation is now being examined against that broader security backdrop.
What happens next?
Investigators are expected to continue examining the vehicles, electronic evidence, communications and relationships among the suspects.
The arrest of the dual British-Iranian national could provide investigators with additional information about whether the September 27 incident was an isolated criminal operation or part of a broader network.
However, an arrest does not establish guilt. The suspects remain under investigation, and any eventual criminal case would have to be established through the British judicial process.
Authorities have also not publicly disclosed exactly what investigators believe the suspects intended to do at RAF Fairford.
