Five British men in their 20s were arrested at RAF Fairford on suspicion of a potential terrorist act. Suspicious substances were found near the U.S.-operated air base. Police confirmed all suspects are UK nationals. The arrests took place at RAF Fairford, an air base run by the Royal Air Force. The suspects are all British men in their 20s. The incident occurred near the U.S.-operated air base. Iran has denied any participation in the plot. The five men were arrested on suspicion of a suspected bombing plot. Weapons were located near the air base. All suspects are confirmed to be British citizens.