Millions of people are expected to attend the funeral procession for Iran's slain supreme leader, Ali Khamenei, in Tehran today, according to Al Jazeera.

Large crowds have gathered in Tehran for the first day of Ayatollah Ali Khamenei's funeral. His body will lie in state at the Grand Mosalla until Monday, after which it will be transported across Iran and Iraq.

Iranian authorities anticipate that millions will participate in the funeral commemorations for former supreme leader Ayatollah Ali Khamenei, according to BBC World. The event is expected to draw significant public attention and mourning across the country.

Iran has observed the second day of funeral processions for its late Supreme Leader Ali Khamenei, with large crowds participating despite a heatwave, according to Al Jazeera.

Huge crowds gathered to mourn the late Supreme Leader of Iran, Ali Khamenei, who was killed alongside family members in a US-Israeli air strike in February. During the funeral, former President Donald Trump expressed a commitment to maintaining calm amidst the tensions surrounding the event, according to Al Jazeera.

Iranians gathered to pray for the late Khamenei, who ruled the Islamic Republic from 1989 until his death at age 86 in an airstrike on February 28, during the onset of the US-Israeli war with Iran. Notably, his son and successor were absent from the prayers, according to Vanguard.