History of Iran reelection was hotly disputed and marred by large protests that formed the "greatest domestic challenge" to the leadership of the Islamic Republic "in 30 years". The resulting social unrest is widely known as the Iranian Green Movement. Reformist opponent Mir-Hossein Mousavi and his supporters alleged voting irregularities and by 1 July 2009, 1000 people had been arrested and 20 killed in street demonstrations. Supreme Leader Ali Khamenei and other Islamic officials blamed foreign powers for fomenting the protest. On 15 June 2013, Hassan Rouhani won the presidential election in Iran, with a total number of 36,704,156 ballots cast; Rouhani won
2009 Iranian presidential election towards the incumbent president. This finding almost exactly matches up with the proportion of the vote that Ahmadinejad received. On 1 June, a campaign office of Ahmadinejad's primary opponent, Mir-Hossein Mousavi, was torched. The office was located in the city of Qom. No group claimed responsibility for the attack. At the same time, it was reported that an assassination had been attempted against former president Mohammad Khatami by means of a bomb placed on an aircraft he was to board. Mobile phone communications were interrupted in Tehran on election day and the BBC has stated that "heavy electronic jamming" was