Who is running Iran while 'supreme leader' is too injured to show his face? Khamenei son says 'vengeance is the priority' in statement read out for him amid claim he is 'in a coma and lost a leg'

This is the moment a statement made on behalf of Iran's new Supreme Leader was read out on state TV, amid rumours he is 'in a coma' and has lost a leg - or is even dead.