Rescuers are searching for the helicopter that was carrying the president of Iran.

Iranian state media are reporting that a helicopter carrying President Ebrahim Raisi and other top officials made a "hard landing" Sunday, with no immediate word on casualties.

The state-run IRNA media outlet reported that the aircraft carrying Raisi, Foreign Minister Hossein Amir Abdollahian and other senior officials went down in a mountainous part of northwestern Iran as they returned from an event along Iran's border with Azerbaijan.

Two of the three helicopters on the trip reportedly reached their destination safely, but crews were still searching for the one carrying Raisi, according to state media.

Iran's Interior Minister, Ahmad Vahidi, reportedly confirmed the "hard landing" of the president's helicopter and said the search-and-rescue operation is underway, according to IRNA.