Iran college asks Bush to speak
Earlier this week, on his return from New York, President Ahmadinejad was due to speak at Tehran University.
Students there wrote him a letter asking about the academic freedoms he had described to his New York audience. They complained about arrests of students and staff members and what they said were the appalling punishments handed out to critics of the president.
They asked to be allowed to meet Mr Ahmadinejad and when they received no reply, they threatened to stage a protest outside the hall, says John Leyne, a BBC correspondent in Tehran.
Shortly afterwards President Ahmadinejad cancelled his visit, though his office said it was because of the current religious festival being celebrated in Iran, our correspondent says.