Iranian President Ebrahim Raisi, a hardliner seen as a potential successor to Supreme Leader Ayatollah Ali Khamenei, was killed when his helicopter crashed in poor weather in mountains near the Azerbaijan border, officials and state media said on Monday. The charred wreckage of the helicopter which crashed on Sunday carrying Raisi, Foreign Minister Hossein Amirabdollahian and six other passengers and crew was found early on Monday after an overnight search in blizzard conditions.Supreme Leader Khamenei, who holds ultimate power with a final say on foreign policy and Iran's nuclear programme, said First Vice President Mohammad Mokhber, would take over as interim president, the official IRNA news agency reported.