A violent by crackdown against protesters in Iran is underway. By way of Twitter, there are reports that hundreds have been injured, gunfire has been heard, helicopters are dumping boiling or chemical-treated water onto protesters. Many embassies have opened their doors to accept the wounded for treatment. There are reports that people in the streets are chanting "Death to Khamenei" in response to the violence unleashed against them.
Earlier, a bomb exploded in a mosque that may have been the intended refuge for Mousavi who has told a crowd that he is ready to die. Reportedly, Mousavi has also called for a national strike if he is arrested.