TEHRAN – A supreme investigation committee run by the General Headquarters of the Armed Forces announced on Sunday afternoon that a "sudden thick fog" resulted in the crash of the helicopter carrying President Ebrahim Raisi and his accompanying team in the forested mountainous region of East Azarbaijan province in northwestern Iran on 19 May.

Raisi and his foreign minister Hossein Amir Abdollahian and some local officials of East Azarbaijan Province died as the helicopter hit the mountain and fell, said the committee tasked to launch probe into the crash.

“The complicated geographical and weather condition in the (mountainous) region in the springtime caused the formation of a sudden and ascending thick fog that caused the helicopter hit the mountain,” the investigation committee found out.