A masked figure seen at the funeral of Iran’s slain Supreme Leader Ali Khamenei, which fuelled speculation that his successor and son Mojtaba Khamenei had finally appeared in public, has been identified as the late leader's eldest grandson.

As the sea of mourners filled a colossal mosque courtyard in Tehran to see the body of Iran’s slain Supreme Leader Ali Khamenei for the last time, a mystery man in clerical robes…

A lonely figure stands apart from the crowd.