A main leader of Iran’s opposition was reported missing on Thursday and both the opposition “green movement” and Iran’s hardliners issued calls for street rallies, escalating tensions after the reemergence of street protests and their brutal suppression on Monday.

The daughters of the missing opposition leader, Mir Hussein Moussavi, told an opposition Web site that they had had no word from either of their parents since Tuesday and feared they had been detained. Security forces have surrounded their home, and all communications have been cut.

On Wednesday, the Web site of another opposition leader, Mehdi Karroubi, reported that the house of his eldest son had been raided and damaged by security officers seeking to arrest him.

Calls have intensified from Iran’s Parliament and judiciary for the prosecution of both men, who have been accused repeatedly of waging war against God, a crime that carries the death penalty. This week, as the opposition revived in solidarity with uprisings in Tunisia and Egypt, law markers in Parliament called for them to be hanged.