Rescue workers have found no signs of survivors at the crash site of the helicopter of Iranian President Ebrahim Raisi, state media reported.
There was initially no official confirmation of the whereabouts of the nine people on board the aircraft, which are believed to include Raisi and Iranian Foreign Minister Hossein Amirabdollahian.
Rescue teams arrived at the suspected crash site of the helicopter in Iran's north-west on Monday morning.
State news agency IRNA published images taken by a drone showing debris from what appears to be a completely destroyed aircraft.
The head of the Iranian Red Crescent, Pir-Hussein Kuliwand, had previously described the situation as bleak.
Raisi and Amirabdollahian were travelling back from a meeting with the president of neighbouring Azerbaijan, Ilham Aliyev, when their aircraft disappeared from radar while over Iran's north-west on Sunday afternoon.