In Tehran, Iranian authorities say they expect millions of people to take part in funeral commemorations for Ayatollah Ali Khamenei, the former supreme leader who died on Tuesday at the age of 90.

The scale of the mourners is a testament to the enduring legacy of Ayatollah Khamenei, who served as Iran's supreme leader for over three decades.

This week, the BBC's Tehran team reported that the streets are empty in anticipation of the massive funeral procession. Overnight, authorities have set up barricades and deployed security forces to maintain order.

massive crowds of mourners waiting in streets

This is a historic moment for Iran and the wider Middle East. Ayatollah Khamenei's influence extended far beyond Iran's borders, and his passing is likely to have significant implications for global politics.

The funeral processions are underway in Tehran, with the coffin being carried through the streets on a ceremonial palanquin. The crowds are vast and emotional, with mourners clad in traditional clothing and carrying flags and banners.

This is not only a celebration of Ayatollah Khamenei's life, but also a tribute to his enduring legacy. As one mourner told the BBC, "He was a great leader who stood up for our values and our faith."

mourners carrying flags and banners

The scale of the mourners is a testament to the enduring legacy of Ayatollah Khamenei. However, the event also raises questions about the future of Iran's politics and the role of its supreme leader.

The funeral processions are expected to continue throughout the day, with the eventual burial at befitting a man of Ayatollah Khamenei's stature.

As the mourners gather, they do so with hope and expectation for what the future holds. For Iran and the wider world, the significance of this event cannot be overstated, and it will undoubtedly shape the course of global politics in the coming weeks and months.