Police declared a major incident at British air base RAF Fairford after several men were arrested on suspicion of offences under the Explosives Act.Toby Shepheard/Reuters
U.K. police said that five men arrested in the early hours of Sunday near an air base used by the United States during its war against Iran are being held on suspicion of preparing a terrorist act that appeared to involve three trucks.
London’s Metropolitan Police, which takes the lead on potential terrorist activities, said police received a call at 12:45 a.m. related to the three suspicious vehicles that appeared to be travelling toward RAF Fairford, a U.K.-owned base that is operated by the U.S. under an agreement dating back to the Cold War.
The arrests come at a time of heightened tensions around the threat from hostile states to the U.K., with Russia and Iran among those that have used proxies to commit crimes on their behalf on British soil. In March, officials said the number of national security cases involving activity by hostile states including Iran increased 50 per cent in the six months to December, 2025.
U.K. police said Sunday that five men arrested in the middle of the night near an air base used by the United States during its war against Iran are being held on suspicion of preparing a terrorist act.
The Associated Press
Fairford has been used by American bombers for strictly limited strikes against Iranian missile sites under an agreement with former British Prime Minister Keir Starmer, who voiced opposition to the war after it was launched by the U.S. and Israel on Feb. 28.
Authorities are investigating a link between the Fairford arrests and Iran as one possibility. Iran has previously indicated that a base used to attack its territory is a legitimate target.
U.S. President Donald Trump praised those who were involved in making the arrests.
“It was an amazing job. We had them under investigation. They were looking to do big damage to our fort. And working with the British worked out great,” he told reporters in Chicago on Sunday. “We had them under view for a long time and we got them.”
U.S. Air Force aircraft at RAF Fairford on Sunday, as U.K. counterterrorism police investigate an incident near the base in the village of Whelford.JUSTIN TALLIS/AFP/Getty Images
The five men were initially arrested on suspicion of committing offences under the Explosives Act in the Whelford area, which backs onto RAF Fairford, which hosts the headquarters of the U.S. Air Force’s 501st Combat Support Wing and the 420th Air Base Squadron.
Aerial footage from Sky News appeared to show a bomb disposal robot roaming between three white trucks. The rear doors of two of the vans were open and large black items could be seen scattered around. The robot appeared to be working toward getting access to the third truck.
Police gave no details as to the nationality of those arrested. Suspects arrested under the Terrorism Act 2000 can be detained for up to 14 days without charge, compared to the 24-hour limit for standard arrests, without an extension application.
“We are in the early stages of an investigation, and five men remain in custody,” said Vicki Evans, the Met’s counterterrorism policing senior national co-ordinator.
Police guard a road leading to RAF Fairford on Sunday.Alastair Grant/The Associated Press
Evans said a 400-metre cordon has been put in place around the three vehicles that raised suspicion while the army conducts examinations. As a precaution, around 85 households have been evacuated whilst these examinations take place. Some have been taken to a nearby recreation centre.
The U.S. embassy in London warned Americans to be cautious and mindful of their personal security.
British Prime Minister Andy Burnham said he knew the incident would be “deeply concerning” for many. In a post on social media, Burnham thanked police and the armed forces for their response and said he was grateful to the residents who have been evacuated from their homes “while precautionary checks are carried out.”
He urged people “not to speculate while the authorities establish the full facts.”
Police cordon off the entrance to the village of Whelford after declaring a major incident and evacuating residents from their homes.Leon Neal/Getty Images
The defence secretaries of the U.S. and the U.K., Pete Hegseth and Wes Streeting, have also spoken about the incident.
British security officials say proxies linked to Iran have been behind a string of arson and sabotage attempts in the U.K. and other countries, many of them targeting the Jewish community. They have previously warned that Tehran could expand its targets in the U.K. if conflicts in the Middle East continue.
A military vehicle patrols the perimeter of the RAF Fairford air base on Sunday.Toby Shepheard/Reuters
Gloucestershire police said the situation appeared to be “contained” and urged residents to follow official advice while the investigation continues.
Julian Tudsbery, who has lived in Whelford for 30 years, said another resident had reported seeing three “suspicious vans” in the village early on Sunday.
“There were several police, three police cars in the drive, and they said you need to evacuate, there’s been a major incident, said he couldn’t elaborate,” he said.