The helicopter that crashed killing the Iranian president, Ebrahim Raisi, and the foreign minister, Hossein Amir-Abdollahian, either did not have a transponder fitted or had it turned off, according to an initial investigation by the Turkish rescue group that found the wreckage.
The Turkish transport minister, Abdulkadir Uraloğlu, told reporters that on hearing news of the crash, Turkish authorities had checked for a signal from the helicopter’s transponder that broadcasts height and location information. “But unfortunately, [we think] most likely the transponder system was turned off or that the helicopter did not have one,” he said.
