Rescue workers continued their search on foot Sunday for the helicopter carrying Iranian President Ebrahim Raisi and Foreign Minister Hossein Amirabdollahian after it went missing in mountainous terrain. The search was hampered by darkness and rain, according to a state television reporter on Sunday evening. The remote, muddy route is inaccessible by road, forcing rescue teams to proceed on foot, he said. Meanwhile, concerns were mounting for the nine people on board, including Raisi and Amirabdollahian. Hours after the crash, there was still no information about their fate, the report said. T…