The head of Iran's powerful Revolutionary Guards warned protesters that Saturday would be their last day of taking to the streets.
The threat is a sign that security forces could be planning to intensify their fierce crackdown on unrest sweeping the country.
Iran has been gripped by protests since the death of 22-year-old Kurdish woman Mahsa Amini in the custody of the morality police last month, posing one of the boldest challenges to the clerical leadership since the 1979 revolution.
