Iran began a state funeral for the late Supreme Leader Ayatollah Ali Khamenei in Tehran on Friday [1].

The event serves as a critical test of the theocratic regime's stability and its ability to mobilize mass public participation during a leadership transition [2, 3].

Khamenei's casket was placed at a religious complex near the Imam Khomeini Mosque [4]. The ceremony is expected to involve a week of mass funeral events [5], though some reports describe the proceedings as a days-long funeral [2].

International participation is significant, with leaders, senior officials, or representatives from more than 30 countries attending the ceremony, according to Iranian media [1]. These delegations have gathered in the capital to pay their respects to the late leader.

Amid the mourning, tensions remain high regarding regional security. An unnamed Iranian army general said the U.S. and Israel should not launch attacks during the procession [3].

The arrival of the body at the religious complex preceded the formal start of the funeral rites [4]. The government has organized the event to project national unity and continuity of power following the death of the Supreme Leader.

Leaders, senior officials, or representatives from more than 30 countries will attend the ceremony

The scale of international attendance and the government's ability to secure the streets of Tehran indicate the regime's immediate priority is demonstrating legitimacy. By warning foreign powers against military action during the mourning period, Iran is attempting to prevent external opportunistic strikes while it manages the internal volatility inherent in a transition of supreme power.