8.57am: The Facebook page of Iran's football coach Afshin Ghotbi has been the target of abuse by opposition supporters after he attended Ahmadinejad's blessing on Monday.
8.13am: Ten protesters have been arrested, a witness told Reuters.
There are more than 5,000 police on the streets of central Tehran, according to state TV.
Former presidents Khatami and Rafsanjani both boycotted the ceremony today. Both former presidents attended Ahmadinejad's inauguration four years ago, but their seats were filled by others this time round, according to photographs displayed by the opposition blogger onlymedhi.
7.51am: "He [Ahmadinejad] is the elected leader" White House spokesman Robert Gibbs said at a press conference yesterday. But he ducked the question of whether the US recognises Ahmadinejad as the legitimate leader of Iran.
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