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British counterterrorism police were questioning five men on suspicion of terrorism and explosives offences on Monday after their arrest near RAF Fairford in western England, where three large white vans were spotted heading toward the base in the early hours of Sunday, according to Reuters. Officers imposed a 400-metre cordon around the airfield and evacuated residents from 85 nearby homes while a bomb disposal unit examined the vehicles, a police statement confirmed. The base has served as a launch point for US B-1 bombers conducting strikes on Iran, prompting prior warnings from Tehran that such facilities represented legitimate targets.
A source familiar with the investigation told Reuters that an Iranian-linked motive was considered the most likely explanation for the incident, although a Russian sabotage operation or an Islamist plot were also under examination. The men, described in some reports as British nationals, were detained following a public tip-off that led armed officers to intercept the vans before they reached the perimeter. No details about the suspects’ identities or the precise nature of any potential explosives have been released by authorities as the probe continues.
Iran’s embassy in London issued a statement categorically rejecting any involvement and condemning what it called unfounded and malicious speculations linking Tehran to the arrests, the Associated Press reported. The denial follows an explicit threat issued by Iran’s Islamic Revolutionary Guard Corps in July, when the group stated that any base used for aggression against Iranian territory is a legitimate target for us, according to BBC coverage of the earlier warning. The IRGC had accused Britain of complicity in regional conflicts by permitting American use of its airfields.
US President Donald Trump said the suspects had been looking to do big damage and indicated that British and American authorities had been investigating them prior to the incident, Reuters reported. The development comes amid heightened tensions after the United Kingdom authorised American bombers to operate from Fairford and other bases for actions against Iranian missile sites targeting vessels in the Strait of Hormuz. A Reuters assessment of the broader pattern noted that police have been investigating Iran links to multiple incidents involving properties connected to Jewish communities or Iranian dissidents in Britain.
In May, Britain imposed sanctions on 12 individuals and entities linked to Iran over accusations of plotting attacks and providing financial support to destabilising groups, according to official statements cited by Reuters. The current case has placed RAF Fairford on its highest state of alert while raising the threat level at other US-hosting bases such as RAF Lakenheath to Charlie, the second-highest, Al Majalla reported. Local security measures now include armoured vehicles and enhanced patrols at affected sites across eastern England.
The US Embassy in London issued a security alert urging American citizens to exercise caution and remain mindful of personal security, citing heightened risks to US-associated facilities, Reuters said. Prime Minister Andy Burnham was briefed on the events and thanked police and armed forces for their response, posting on X that the incident near RAF Fairford would concern both local residents and the wider public. The arrests have drawn attention to the security challenges surrounding British support for US operations in the ongoing regional conflict that began earlier in 2026.
