British police have arrested two men for a second time over alleged cooperation with a foreign intelligence service. The suspects are accused of helping that service in an inquiry into an incident near RAF Ferford in Gloucestershire. The base is used by the United States Air Force, which has drawn the episode into British and American security concerns. Investigators believe the incident on September 27 was very probably connected to Iran. The renewed arrests indicate that the investigation remains active despite the men’s previous detention. The published account does not say whether the foreign service involved was Iranian or another state’s agency. No details have been released about the incident, the evidence against the suspects or the charges they face.