[3] The reasons for his arrest was because he was critical of Velayat Faqih and Iranian Supreme Leader, Ali Khamenei in a lecture he gave in Qom.
[4] His arrest sparked outrage from the followers of his father, and as a result of this it led to protests in London, Kuwait and Iraq.
[5] In London, protestors–linked to the controversial cleric, Yasser al-Habib–managed to climb onto the balcony of the Iranian Embassy, waving their flags and chanting anti-Khamenei and Islamic Republic slogans.
[8][9] Iranian Ambassador to United Kingdom, Hamid Baeidinejad tweeted that the assailants belonged to the "Shirazi Cult", and that the staff in the embassy were well and not harmed.
[8] The current Prosecutor-General of Iran, Mohammad Jafar Montazeri warned that the country's Judicial system will take "any legal action against the supports of al-Shirazi's father, and during an Iranian State TV (IRIB) interview claimed that the Shirazi sect is causing fitna amongst Muslim Sects.