State TV showed Mostafa, Meysam and Masoud Khamenei praying behind the coffins laid out in the vast courtyard of Tehran's Imam Khomeini Grand Mosalla, a sprawling religious complex, but not Mojtaba, who took over as leader.

As Iran prepares to bury former Supreme Leader Ali Khamenei, attention is turning to his successor. Mojtaba Khamenei's prolonged absence from public view has raised questions…

Will Mojtaba Khamenei appear at his father's funeral? Some argue the succession ritual demands it. Others aren't sure he's even alive to attend.