Hopes are fading that Iranian President Ebrahim Raisi and his foreign minister have survived a helicopter crash in mountainous terrain and icy weather, an Iranian official said on Monday after search teams located the wreckage, Paralel.Az reports.

"President Raisi's helicopter was completely burned in the crash ... unfortunately, all passengers are feared dead," the official told Reuters.

Rescue teams fought blizzards and difficult terrain through the night to reach the wreckage in East Azerbaijan province in the early hours of Monday.

“We can see the wreckage and the situation does not look good,” the head of Iran’s Red Crescent, Pirhossein Kolivand, told state TV.

“With the discovery of the crash site, no signs of life have been detected among the helicopter's passengers.”

Raisi, opens new tab, 63, was elected president in 2021, and since taking office has ordered a tightening of morality laws, overseen a bloody crackdown on anti-government protests and pushed hard in nuclear talks with world powers.

Iranian Supreme Leader Ayatollah Ali Khamenei, who holds ultimate power with a final say on foreign policy and Iran's nuclear programme, had earlier sought to reassure Iranians, saying there would be no disruption to state affairs.

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The helicopter of the President of Iran, Ibrahim Raisi, was completely burnt as a result of the accident, Reuters agency reported citing an unnamed official.

"The helicopter of the President of Iran was completely burnt as a result of the accident," he said.