Iran will begin a six-day funeral for Ayatollah Ali Khamenei, as authoritarian leaders gather in Tehran, and questions persist over Mojtaba Khamenei's health.

Iran is preparing the largest state funeral in its history for former Supreme Leader Ayatollah Ali Khamenei, who was killed in a US-Israeli strike on 28 February.

By Parisa Hafezi and Angus McDowallDUBAI, July 2 - Iran's ruling clerics are preparing days of mass funeral rites for Ayatollah Ali Khamenei as a show of public devotion to the…