Iran staged an extravagant, weeklong funeral procession for slain Supreme Leader Ayatollah Ali Khamenei. Absent from the events was his son, Mojtaba, the new supreme leader.

July 11 (Reuters) - A written statement from Iran's Supreme Leader Ayatollah Mojtaba Khamenei threatened vengeance for the death of his predecessor and father on Saturday, but added that it would depend not only on Iran but also on "free people around the world".

One analyst in Tehran told Newsweek that certain Iranian factions "may attempt to decentralize the system in an informal manner."

The absence of Iran's supreme leader Mojtaba Khamenei from the funeral ceremonies of Ali Khamenei raised questions about his health and fear of assassination, as well as indicating he may perform a quite different function as number one compared with his all-powerful father.

Mojtaba Khamenei's absence from public life following his appointment as Iran's Supreme Leader has led to widespread speculation concerning his health and capability. Despite familial representation in state ceremonies,

After Ayatollah Ali Khamenei's death, Iran enters an uncertain era under Mojtaba Khamenei, as economic hardship, IRGC influence, regional tensions and nuclear negotiations shape the future.

Mourners have packed the streets of Tehran for the main funeral procession for slain Iranian Supreme Leader Ayatollah Ali Khamenei. Follow for live updates.