Iran election campaign

A woman stands in front of a campaign banner for President Mahmoud Ahmadinejad, after leaving a ceremony at a mosque in Tehran to mark the 20th anniversary of the death of the Islamic Republic's founder, Ayatollah Khomeini, 4 June 2009 Photograph: Morteza Nikoubazl/Reuters

Supporters of Ahmadinejad, the hardline president, climb up a pillar at a construction site after a pre-election rally in Tehran, 8 June 2009 Photograph: Damir Sagolj/Reuters

Supporters of the Iranian president leave the musalla (a place of prayer) after attending a rally in Tehran, 8 June 2009 Photograph: Kamran Jebreili/AP

Presidential candidate Mir Hossein Mousavi addresses his supporters during a pro-reform campaign rally at Badr stadium in southern Tehran, 8 June 2009 Photograph: Behrouz Mehri/AFP/Getty Images

Supporters of the moderate Mousavi hold pictures of him during the rally at the Badr stadium, 8 June 2009 Photograph: Raheb Homavandi/Reuters

An Ahmadinejad supporter holds a picture of the incumbent after a pre-election gathering in Tehran, 8 June 2009 Photograph: Damir Sagolj/Reuters

A supporter of Mousavi holds a poster of the reformist candidate during a street rally in the Iranian capital, 8 June 2009 Photograph: Vahid Salemi/AP

A Mousavi supporter distributes pictures in Tehran of the reformist candidate which also feature the former Iranian president Mohammad Khatami, 7 June 2009 Photograph: Ahmed Jadallah/Reuters

Supporters of Mousavi, a former prime minister, react as he addresses them at the stadium in the city of Karaj, 6 June 2009 Photograph: Damir Sagolj/Reuters

Supporters of Mousavi, the candidate most likely to beat Ahmadinejad, attend the Karaj rally, 6 June 2009 Photograph: Behrouz Mehri/AFP/Getty Images

A supporter of Ahmadinejad looks at a picture of the incumbent after Friday prayers at Tehran University, 5 June 2009 Photograph: Damir Sagolj/Reuters

A boy wearing a headband, with the colours of Iran's flag, peers behind women attending Friday prayers at Tehran University, 5 June 2009 Photograph: Damir Sagolj/Reuters

Ahmadinejad accepts letters from supporters at a rally at Tehran's Azadi sports complex during his re-election campaign, 2 June 2009 Photograph: Caren Firouz/Reuters

Seeking a second four-year term, Ahmadinejad addresses the Azadi rally, 2 June 2009 Photograph: Caren Firouz/Reuters

An Iranian woman walks past campaign posters for Mehdi Karroubi, a reformist cleric and presidential candidate, in Islamshahr, 31 miles south-west of Tehran, 30 May 2009 Photograph: Behrouz Mehri/AFP/Getty Images

A supporter of Mousavi shows her hands with the inscription, in Persian, "woman = man" during a campaign rally in Tehran, 30 May 2009 Photograph: Abedin Taherkenareh/EPA

The former speaker of the Iranian parliament Karroubi, left centre, visits Amirkabir University, as students rally at the main entrance to the university, 30 May 2009 Photograph: Hasan Sarbakhshian/AP

The former Revolutionary Guards commander, now presidential candidate, Mohsen Rezai, speaks during an interview in Tehran, 29 May 2009 Photograph: Atta Kenare/AFP/Getty Images

Identical twins hold campaign posters of Karroubi, right, with his senior advisor, Gholamhossein Karbaschi, a former mayor of Tehran, while attending a stadium rally in the capital, 29 May 2009 Photograph: Raheb Homavandi/Reuters