Five British men in their 20s were arrested at RAF Fairford on suspicion of a suspected bombing plot. 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 administered 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 involvement in the plot. The five men were arrested on suspicion of a bomb plot. Explosives were found near the air base. All suspects are confirmed to be British citizens.