Ayatollah Ali Khamenei, who ruled over the Islamic Republic of Iran for 37 years, was killed along with several family members in an airstrike in February.

The first day of public ceremonies has begun as Iran pauses diplomacy with the US for the funeral. Follow for live updates.

Follow live updates on the historic state funeral of Ayatollah Ali Khamenei. Track foreign delegate arrivals and Iran's transition under Mojtaba Khamenei.

Iran warned the U.S. and Israel against any "miscalculation" ahead of Ayatollah Ali Khamenei's funeral as U.S. Ambassador Mike Waltz declared the longtime supreme leader had "blood on his hands.

Huge crowds of mourners gathered on the streets of Tehran ahead of the funeral ceremonies for the late Supreme Leader Ayatollah Ali Khamenei, scheduled to take place from July 4 through July 9. Foreign dignitaries have also begun arriving to pay their respects to the late leader.

The UK could trigger tensions with Iran as it gears up for its 'funeral of the century' by ploughing ahead with plans to de-mine the Strait of Hormuz during mourning for Ayatollah Ali Khamenei.

The week-long mourning ceremonies have begun for the late leader, who was killed in US-Israeli strikes on February 28 this year.