An official with the Iranian Judiciary has rejected reports that the heads of the sedition movement, Mir-Hossein Mousavi and Mehdi Karroubi, have been taken into custody, Press TV reported.
"These two are presently in their own homes and restrictions have been imposed on their contact with suspicious elements," the official was quoted by Fars News Agency as saying on Monday.
Foreign media outlets had earlier quoted Iran's opposition websites as reporting that Mousavi and Karroubi were arrested.
Judiciary Spokesman Gholam-Hossein Mohseni-Ejei had earlier warned that if necessary, tougher measures would be taken against the "domestic counter-revolutionary movement."
"Today, this movement has gone beyond sedition and turned into [a] counter-revolutionary [one]," he was quoted by IRNA as saying.