Iran buries ​its slain Supreme Leader Ayatollah Ali Khamenei on Thursday at the country's holiest shrine, with his son and successor Mojtaba Khamenei still hidden from public view after being disfigured in the strike that killed his father. The burial in Mashhad in northeast Iran follows a week of mass funeral processions, rallies and mourning ceremonies that has coincided ​with renewed conflict with the United States following weeks of truce. Read moreMiddle East live: US says it struck 90 sites in Iran as Tehran targets Kuwait, Qatar, Bahrain Crowds marched through Mashhad on Thursday morning, the golden onion dome ⁠and minarets of the Shrine of Imam Reza glinting in the morning sun, as they waved Iranian flags, photographs of the late Khamenei and placards with revolutionary slogans. As Khamenei's body was transported around Iran and Iraq over the ‌past week, the Islamic Republic's clerical leaders encouraged huge crowds to attend in an effort to vaunt the might and ideological ⁠fire of their theocratic state. Read moreRegime supporters and opposition share AI-generated images of Khamenei’s funeral However, despite it having survived a months-long blitz by its strongest enemies the United States and Israel, Iran faces huge internal challenges and the legacy of Khamenei's 37-year rule is bitterly disputed. 'Kill Trump' placards appear at burial ceremony The whereabouts of Mojtaba ​Khamenei, proclaimed Supreme Leader by a clerical assembly a week after his father's death, has remained a mystery to Iranians. He ‌has not appeared in public since the war began with the strike that killed Ali Khamenei on February 28, and while he has issued written statements, no image or video or voice recording of him has been issued. He suffered debilitating injuries in that same strike, his face disfigured and limbs badly wounded. Senior sources in Tehran have said ‌he is recovering but that he has not yet been well enough to manage public appearances and state security services are also trying to limit his exposure in case of more US attacks.