The Iranian Supreme Leader demanded an end to street protests; the opposition is clearly not ready to obey. There have been clashes with police and a bomb blast as thousands of supporters of defeated presidential candidate Mirhossein Mousavi staged another mass demonstration. This in further defiance of Supreme Leader Ali Khamenei, who warned the opposition that its protest marches had to stop.Witnesses say police have fired shots into the air and used teargas against protesters. They are also reported to have used water canon. Authorities have banned foreign media from covering demonstrations, but amateur footage shot on mobile phones is getting through to news agencies. Elsewhere two people are dead and least eight wounded after a suicide bomb attack at the shrine of revolutionary founder Ayatollah Khomeini. And, adding to the tension, Mousavi has sent a letter to ruling clerics insisting that the disputed June 12 election be annulled. The reformist ex-prime minister is also said to allege that the rigging of the vote was planned months ago. Witnesses say he told supporters today that he is ready for “martyrdom”.