Some Iranians are beginning to return home from Turkey amid reports the wave of protests has eased.
A local rights group says a violent crackdown appears to have temporarily suppressed the unrest.
While an internet blackout continues to limit information, residents in Tehran say the capital has been relatively quiet.
Meanwhile, exiled Iranian crown prince Reza Pahlavi vows he is ready to return and lead an interim government if the regime collapses.
