Iran began a four-day funeral procession on Saturday for its late supreme leader, Ayatollah Ali Khamenei [1], [3].

The ceremonies mark the end of a leadership era following a high-profile assassination that has heightened geopolitical tensions in the region. The event serves as both a national mourning period and a demonstration of state stability.

Hundreds of thousands of mourners packed the streets of Tehran to pay their respects [1]. While some reports suggest millions flooded the streets [2], official estimates from other sources place the crowd in the hundreds of thousands [1]. The processions are part of a sequence of events scheduled to conclude on Thursday [1], [3].

Khamenei, who was 86 years old at the time of his death [3], was killed on Feb. 28 in a joint U.S.–Israel attack [4], [1]. The strike removed the highest authority in the Iranian government, triggering a period of national grief and security alerts.

The funeral activities will move from the capital to the city of Mashhad. Officials said the final burial will take place at the Imam Reza shrine [3], [1].

The atmosphere in Tehran remains heavy as the country navigates the vacuum left by the supreme leader. The days-long nature of the ceremony is intended to allow citizens across the country to participate in the farewell rituals before the final interment in Mashhad [2], [3].

Hundreds of thousands of mourners packed the streets of Tehran

The assassination of Ayatollah Ali Khamenei by U.S. and Israeli forces represents a significant escalation in Middle East conflict. By conducting a prolonged, highly visible funeral, the Iranian state is attempting to consolidate domestic loyalty and project a sense of continuity and defiance in the face of foreign military action.