The authorities announced tough new restrictions on foreign media, requiring journalists to obtain explicit permission before covering any story. Journalists have also been banned from attending or reporting on any unauthorised demonstration.
Our correspondent says they are the most sweeping restrictions he has ever encountered reporting anywhere.
The march was due to have taken place in Tehran's Vali Asr Square at the same time as a demonstration there by supporters of
Jon Leyne Reporting from Tehran
The more I see this announcement about being willing to recount ballots, the more I think it is just a political ruse to try and wrong-foot the opposition. They have offered a recount, but they have not said who is going to carry it out. Maybe the same people who did the election count to start with.
In any case, the opposition says there were so many other irregularities, that a recount alone would not satisfy them. For example, many more ballot papers were issued than counted, they say. Some people did not get enough ballot papers so they could not vote in areas loyal to the opposition. Polling stations were closed early, and so on and so forth.
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