Demonstrators marched against Ayatollah Montazeri in the holy city of Qom last week after he accused Iran's rulers of usurping the Islamic revolution's leadership.
'Ayatollah Montazeri has not been arrested. I deny that,' said the spokesman. He said demonstrators had disrupted the Ayatollah's theology class in a hall, which the police then sealed, seizing cars and furniture.
Ayatollah Montazeri will not resume teaching until after holidays for the holy months of Ramadan ending in late March.