Robert Fisk has a street scene report from Iran:
I've just been witnessing a confrontation, in dusk and into the night, between about 15,000 supporters of Ahmadinejad - supposedly the president of Iran - who are desperate to down the supporters of Mr Mousavi, who thinks he should be the president of Iran.
There were about 10,000 Mousavi men and women on the streets, with approximately 500 Iranian special forces, trying to keep them apart.
It was interesting that the special forces - who normally take the side of Ahmadinejad's Basij militia - were there with clubs and sticks in their camouflage trousers and their purity white shirts and on this occasion the Iranian military kept them away from Mousavi's men and women.
In fact at one point, Mousavi's supporters were shouting 'thank you, thank you' to the soldiers.
One woman went up to the special forces men, who normally are very brutal with Mr Mousavi's supporters, and said 'can you protect us from the Basij?' He said 'with God's help'.