A thick mass of fog caused the helicopter that was carrying Raisi and his companions to crash into the mountain, an Iranian probe has concluded on Sunday.
![Saudi Arabia is due to host a summit of leaders from Islamic countries [Getty]](/sites/default/files/styles/image_156x88/public/2023-11/GettyImages-1730867467.jpg?h=199d8c1f&itok=QvcXg_ag)
