TIMELINE: Iranian election and aftermath

(Reuters) - Here is a summary of the main developments in the aftermath of Iran's June 12 presidential election, which took place against a background of renewed tensions with the West over Tehran's nuclear program.

June 13 - Ahmadinejad wins the presidential election with nearly 63 percent of the vote compared with 34 percent for challenger Mirhossein Mousavi. Thousands of protesters clash with police. Mousavi calls result a "dangerous charade." More than 100 activists from the leading reformist party Mosharekat are arrested, a reformist says.

June 14 - Mousavi says he has formally asked Iran's Guardian Council to cancel the election result.

June 15 - Seven people are killed on the fringes of a huge march by Mousavi supporters in central Tehran, state media says. There are also pro-Mousavi demonstrations in the cities of Rasht, Orumiyeh, Zahedan and Tabriz.

June 16 - Leading Iranian reformist Mohammad Ali Abtahi, a former vice-president, is arrested, his office says.

-- The Guardian Council says it is ready to carry out a partial recount of ballots but rules out annulling the poll.

-- Tens of thousands of pro-Mousavi demonstrators march in northern Tehran and many of them go to the state television IRIB building, which was ringed by riot police. Ahmadinejad's supporters mobilize thousands of demonstrators in central Tehran.

-- Authorities ban foreign journalists from leaving their offices to cover street protests.

June 17 - Thousands of Iranians march in quiet defiance in central Tehran.

-- Ahmadinejad defends the legitimacy of the vote, telling a cabinet meeting it has "posed a great challenge to the West's democracy," Mehr news agency reports.

-- Pro-Mousavi protests have been reported in the cities of Rasht, Orumiyeh, Zanjan, Zahedan, Tabriz and Mashhad.

-- Saeed Laylaz, editor of business daily Sarmayeh, and pro-reform activist Mohammadreza Jalaiepour are arrested, a reformist source says.

June 18 - Thousands of Mousavi's backers, wearing black and carrying candles, rally in Tehran to mourn those killed in the mass protests.

-- A spokesman for the Guardian Council says it has begun examining 646 complaints submitted after the June 12 vote and invited the three losers to discuss their complaints on June 20.

-- Iran's English-language state television has reported eight people killed in five days of protests. The ISNA news agency, quoting provincial officials, says 88 people were arrested in post-election unrest in the city of Mashhad and up to 60 people in Tabriz in the northwest.

-- Security agents detain opposition politician Ebrahim Yazdi in hospital, one of his allies says. Yazdi heads the banned Freedom Movement and was foreign minister in Iran's first government after the revolution.