Crowds gather as six-day funeral for former Iranian supreme leader begins

Up to 30 million people expected to attend delayed events for Ali Khamenei, killed at start of war with US and Israel

The funeral of the former Iranian supreme leader has begun as the gates of the sprawling Grand Mosalla mosque in central Tehran let in thousands of mourners who had been waiting through the night to enter the grounds.

Iran is staging mass funeral processions for Ali Khamenei - whose 37-year reign was brought to an end in February by the first airstrike of the war launched by the US and Israel.