A South Korean held in Russia on an espionage allegation is a missionary dispatched there to support the needy and spread the gospel, a South Korean Christian aid group said Wednesday, calling the spying suspicion “preposterous.” Russia’s state news agency Tass said Monday that the South Korean was detained “at the start of the year” in the eastern city of Vladivostok on suspicions that he passed state secrets to foreign intelligence services. Tass said he was the first South Korean arrested in Russia on alleged espionage.