The ceremonies mark the final phase of national mourning for Khamenei, who was killed in Israeli and US strikes in February, according to Iranian state media reports.

The funeral proceedings are expected to start in Tehran before moving through additional stages of national observance ahead of burial at the Imam Reza shrine in Mashhad, one of the holiest sites in Shia Islam.

Khamenei led the Islamic Republic for more than three decades, having assumed power in 1989 following the death of Iran’s founding Supreme Leader Ayatollah Ruhollah Khomeini. His death has triggered a prolonged transition period within Iran’s political and religious leadership structure.

State media did not provide additional details on security arrangements for the ceremonies, which come amid heightened regional tensions following months of conflict involving Iran, the United States and Israel.

The announcement follows earlier postponements of funeral arrangements amid security concerns and ongoing instability in the region.