Iran's presidential chief of staff Gholamhossein Esmaili has revealed more details about a helicopter crash in northwest of the country over the weekend which led to the death of President Ebrahim Raisi, Foreign Minister Hossein Amirabdollahian and two top officials in the province of East Azerbaijan. Iran news agency (IRNA) quoted Esmaili as saying on Monday in an interview with the state TV that weather conditions in Iran's Varzaqan region, where president Raisi's copter crashed, was perfect at the start and during most of the flight that took place a day earlier. Esmaili was in one of the three helicopters that were returning from a dam inauguration ceremony on Iran's border with the Republic of Azerbaijan. He said the helicopters had taken off while weather condition in the area was normal. After 45 minutes into the flight, the pilot of president Raisi's helicopter who was in charge of the convoy, ordered other helicopters to increase altitude to avoid a nearby cloud. However, the president's helicopt er, which was flying between the two others, suddenly disappeared, he said. "After 30 seconds of flying over the clouds, our pilot noticed that the helicopter in the middle had disappeared," said Esmaili, adding that the pilot decided to circle and return to search for the president's helicopter. Easmaili said that after several attempts to contact president's helicopter through radio devices, and while it was unable to decrease altitude because of the clouds, their helicopter continued its flight and landed at a nearby copper mine. He said Foreign Minister Amirabdollahian and head of president's protection unit didn't respond to repeated calls afterwards. The official said, however, that pilots of the two other helicopters had contacted Captain Mostafavi, who was in charge of the president's helicopter, but the one who took the call was Tabriz Friday prayer leader Mohammad Ali Ale-Hashem, whose situation was not good but said the copter had crashed into a valley. Esmaili himself made a second contact wi th Ale-Hashem and received the same answers about the situation. When the location of the accident was found, the conditions of the bodies indicated that Raisi and other companions had died instantly but Ale-Hashem died after several hours, he said. Source: Qatar News Agency