Iranian reformists, among them Mohammad Khatami, the former president, have called for a referendum to resolve the crisis that has gripped the country since last  month’s disputed presidential election. Khatami, whose 1997-2005 presidency saw a thaw in the Islamic republic’s relations with the West, hit out on Monday at the conduct of the June 12 vote that saw Mahmoud Ahmadinejad, his hardline successor, returned to power.

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