UK charges 2 men in suspected Iran-linked incident at RAF Fairford after US bombers pulled

British prosecutors charged two men Tuesday under the U.K.’s National Security Act following an incident at RAF Fairford, a key base used by the U.S. military’s heavy bombers.

Mohmed Abdulkarim, 24, of London, was charged with assisting a foreign intelligence service. Nouman Essghir, 24, was charged with entering a prohibited place for a purpose prejudicial to the United Kingdom, according to the Crown Prosecution Service.

British counterterrorism police said they believe the foreign country Abdulkarim was assisting was Iran...