The BBC's Jon Leyne, in Tehran, says Monday's rally was the biggest demonstration in the Islamic republic's 30-year history and described it as a "political earthquake. The government had outlawed any protest following two days of unrest, with the interior ministry warning that "any disrupter of public security would be dealt with according to the law".
"There has been sporadic shooting out there... I can see people running here," Reuters quoted a reporter of Iran's Press TV as saying from Tehran's Azadi Square. "A number of people who are armed, I don't know exactly who they are, but they have started to fire on people causing havoc in Azadi Square." A photographer at the scene told news agencies that security forces had killed one protester and seriously wounded several others.
He said the shooting began when the crowd attacked a compound used by the Basij a religious militia linked to the country's powerful Revolutionary Guard.
So it begins. I shudder to think how it will end, how many will die.