On the weekend of 13 and 14 June, in a series of raids across Tehran, the government arrested over 170 people, according to police officials. Among them were prominent reformist politicians, including Mojahedin of the Islamic Revolution Organization (MIRO) founder Behzad Nabavi, Islamic Iran Participation Front (IIPF) leader Mohsen Mirdamadi, and former president Mohammad Khatami's brother Mohammad-Reza Khatami, who was later released. Also arrested were Mostafa Tajzadeh and Mohsen Aminzadeh, whom the IRNA said were involved in orchestrating protests on 13 June. Anonymous sources said that the police stormed the headquarters of the IIPF and arrested a number of people. Iranian journalist Mashallah Shamsolvaezin claimed that presidential candidate Mir-Hossein Mousavi was put under house arrest, although officials denied this. An estimated 200 people were detained after clashes with students at Tehran university, although many were later released.