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.
![Iran and its allies have been commemorating Qasem Soleimani this week [Getty]](/sites/default/files/styles/image_156x88/public/2022-01/GettyImages-1237565442.jpg?h=199d8c1f&itok=w3Ah2nnM)
