Iranians packed the streets of Tehran on Monday for the funeral procession of the late Supreme Leader Ayatollah Ali Khamenei [1].

The death of the supreme leader creates a significant power vacuum in Iran, potentially destabilizing the region as the nation navigates a leadership transition during a period of high geopolitical tension.

Crowds filled the capital as part of a multi-day mourning period that began over the weekend [2]. Around 20 million Iranians were expected to pack the streets for the funeral [3]. In central Tehran, drone footage showed tens of thousands of people crammed into a single boulevard [4].

The atmosphere during the procession was marked by grief and political anger. Some mourners used the gathering to call for revenge against the U.S. and Israel [5]. Other participants chanted for vengeance against Donald Trump during the events [6].

Reports on the cause of death vary. Some accounts suggest the supreme leader was killed by the U.S. and Israel [7], while other reports refer to him as the late leader without specifying a cause [1].

The procession through Tehran serves as the primary public event in a series of ceremonies intended to honor Khamenei's legacy, and consolidate the state's authority during the transition [2]. Security forces remained present as the crowds moved through the city streets [1].

Around 20 million Iranians were expected to pack the streets for the funeral

The scale of the funeral procession demonstrates the state's ability to mobilize massive crowds, but the calls for vengeance highlight the volatile nature of the current political climate. The contradiction regarding the cause of death suggests a narrative battle between official accounts and claims of foreign involvement, which could be used by the Iranian government to justify future escalations against the US and Israel.