The United States has withdrawn all of its B-1 bombers from RAF Fairford, a British airbase in Gloucestershire, citing new security concerns that reportedly involve threats linked to Iran. The Pentagon confirmed on Sunday that the bombers, which had been stationed at the base for operations including strikes on Iran, have been redeployed to their home stations in the United States.

The move followed a counterterrorism investigation sparked by a suspicious incident on September 27, when a local farmer reported seeing a group of men with several vans near the base. Police subsequently arrested five British nationals in their mid-20s near RAF Fairford. Although no explosives were found, authorities recovered a quantity of petrol from the vans. A sixth man, a 25-year-old dual UK-Iranian national, was also arrested on October 1 in Westminster on suspicion of preparing terrorist acts. All individuals have since been released on police bail, prompting criticism from U.S. officials.

British Prime Minister Andy Burnham confirmed that there were "strong indications" Iran was involved in the incident, a claim Tehran has denied. Iran’s foreign minister Abbas Araqchi described the accusations as baseless, emphasizing Tehran’s rejection of any involvement. The U.S. Secretary of State Marco Rubio referred to a “foreign actor” being implicated and expressed confidence in the security of U.S. military sites, noting close cooperation with British authorities throughout the investigation.

The rapid redeployment of an entire squadron of 12 B-1 bombers from Fairford was unusual, with some aircraft departing so quickly that aerial refueling planes had to be scrambled to support their return flights. U.S. officials informed media outlets that the decision was prompted by new, urgent intelligence about an Iran-backed plot targeting the base. This intelligence was reportedly related to earlier threat warnings received several weeks prior but escalated in urgency over the weekend.

The British government maintained that RAF Fairford remains secure. Downing Street officials emphasized “tried and tested approaches” to base security and said the site was safe despite the U.S. withdrawal. However, some British defense commentators and opposition parties have expressed concerns about security standards at military installations, highlighting that this incident follows several breaches in recent years.

RAF Fairford has been a vital strategic location for the U.S., serving as a key European base for deploying heavy bombers to the Middle East. During recent operations, the base was used for defensive strikes on Iranian missile sites following attacks on ships in the Strait of Hormuz, with London restricting offensive use of its bases in the region. Iran’s Revolutionary Guards had previously declared the base a legitimate military target. Experts have noted the challenges in protecting such a large airbase against potential threats, including drone attacks, although the level of threat Iran can pose on British soil remains debated.

The incident and subsequent bomber redeployment have underscored lingering tensions between the U.S. and Iran as well as the complex security dynamics experienced by allied nations supplying bases for American military assets. Further investigations by British counterterrorism units remain ongoing, with authorities declining to comment on any additional threats to residents living near the airbase.