Today's report by IRNA said the two had "espionage devices" while pretending they were on a tourist visit to Abu Musa Island in the Persian Gulf. It is the largest in a three-island cluster controlled by Iran but also claimed by the United Arab Emirates.
The report said there would be further investigation but did not elaborate.
Iran occasionally announces the arrest of spies without further reporting their fates.
Last month, Iran said it sentenced a 62-year-old man to a 10-year prison term on espionage charges.
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