The late Iranian president, Ebrahim Raisi, is to be buried in his home city of Mashhad on Thursday.
Recall that President Ebrahim Raisi died in a helicopter crash at the weekend alongside eight others.
They went down in dense clouds in the mountains while travelling back from a meeting with Ilham Aliyev, the president of Azerbaijan.
Raisi is to be laid to rest at the city’s shrine of Imam Reza, the eighth imam of Shia Islam.
High-ranking representatives of friendly states are expected to attend, including Russian parliamentary leader Vyacheslav Volodin.
Iran’s state railway company has organised special trains to take mourners from Tehran to the north-eastern city.
There have been several ceremonies and public displays of mourning for Raisi, late foreign minister Hossein Amirabdollahian and other victims of Sunday’s crash.
Millions of mourners flocked to a funeral procession in Tehran on Wednesday.
Iran’s religious leader, Ayatollah Ali Khamenei, had ordered five days of national mourning, and a nationwide holiday was held on Wednesday.