Iran's official news agency says the country's judiciary has issued indictments against 15 'American and Zionist' spies.
IRNA on Tuesday quoted Tehran's chief prosecutor Abbas Jafari Dowlatabadi as saying the suspects carried out espionage activities against Iran.
He did not elaborate on the nationality of the suspects, nor say when they were detained.
The report does not say whether the suspects include any of the 12 alleged agents that Tehran said in November had been arrested for ties to the American CIA, Israel's Mossad and regional intelligence agencies.
Iran periodically announces the capture or execution of alleged U.S. or Israeli spies, and often no further information is released.