Millions of mourners gathered at the Jamkaran Mosque in the Iranian city of Qom on Tuesday to attend funeral prayers for former Supreme Leader Ayatollah Ali Khamenei and members of his family.

According to Iran’s official IRNA news agency, the prayers were led by Grand Ayatollah Abdollah Javadi Amoli and attended by a large crowd of mourners, religious scholars, seminary students, government officials, senior military commanders and other prominent figures.

Following the prayers, the funeral procession was scheduled to travel from the Jamkaran Mosque to the shrine of Hazrat Fatemeh Masoumeh, one of Iran’s most revered religious sites.

IRNA reported that crowds from across Iran had begun arriving in Qom on Monday, filling the mosque’s courtyards and prayer halls before dawn on Tuesday.

Footage and photographs released by Iranian media showed streams of mourners arriving on foot and by vehicle, many carrying Iranian national flags and red flags associated with calls for vengeance.

The funeral ceremonies are part of a multi-city procession that began in Tehran on Monday and will continue through the Iraqi cities of Najaf and Karbala before returning to Iran for Khamenei’s burial at the Imam Reza shrine in the northeastern city of Mashhad.