The Ministry of National Defense yesterday confirmed that three retired military officers had been arrested on suspicion of spying for China, in what legislators described as one of the nation’s worst cases of espionage.

The Ministry of National Defense said that Commander Chang Chih-hsin (張祉鑫), former director of the political warfare department of Naval Meteorological & Oceanographic Office (METOC), was indicted by military prosecutors on suspicion of working as an agent for the Chinese.