Iran state media confirmed on Monday that president Ebrahim Raisi died in a helicopter crash on a foggy mountain side in a hard-to-reach corner of north-west Iran.

Was his death an accident, or not? And might it escalate the ever-growing tensions between Iran, and Israel, its sworn enemy, which some have speculated is behind the accident?

Today, digital foreign editor Chris Zappone on the hard-line cleric who oversaw a morality crackdown in Iran that led to nationwide protests. And what impact his death could have on stability, or instability, in the wider region.

• For more, see the BBC's 'Mahsa Amini: How one woman's death sparked Iran protests'.