A helicopter carrying Iran's President Ebrahim Raisi was involved in "an accident" in poor weather conditions on Sunday, state media reported, with a search underway and no news yet on his condition.

Iranian state media said the crash occurred on Sunday near Jolfa in Iran’s East Azerbaijan province.

Raisi was returning from a visit to neighbouring Azerbaijan, where he had travelled to inaugurate a dam alongside the country’s President Ilham Aliyev, when the incident took place.

His convoy included three helicopters, and the other two had "reached their destination safely," according to Tasnim news agency.

People who were with the president inside the helicopter managed to make an emergency call, according to the semiofficial Tasnim News Agency.

Search and rescue team were headed to the remote mountain area, state media in the Islamic republic reported, adding that Foreign Minister Hossein Amir-Abdollahian was also aboard the aircraft.

"The harsh weather conditions and heavy fog have made it difficult for the rescue teams to reach the accident site," state TV said in an on-screen news alert.

State TV broadcast footage of an Iranian Red Crescent team walking up a slope in thick fog, as well as live footage of crowds of worshippers reciting prayers in the holy Shrine of Imam Reza in the city Mashhad, Raisi's hometown. -- AGENCIES