Iran charges three detained Americans with spying

He was apparently alluding to former deputy defense minister Ali Reza Asgari who went missing in Turkey in February 2007. Iran's police chief said at the time that Western intelligence services might have kidnapped him.

Dolatabadi, the Iranian prosecutor, said the case of a Danish student detained during a rally on November 4 to mark the 30th anniversary of the seizure of the U.S. embassy was under investigation.

"This accused Danish citizen has introduced himself as a reporter but he holds no official press accreditation. Investigations about him continue," he said. "Today the Danish embassy lawyer was allowed to meet the prisoner."

Police detained more than 100 people during clashes with opposition supporters in Tehran last week. IRNA said a reporter from Agence France Presse who was detained in the protests was among five people released on Saturday.

Clotilde Reiss, a French teaching assistant, was arrested in Iran on spying charges on July 1 in connection with the post-vote unrest. She was released on bail in August but not allowed to leave the country.