Iran has said it would not hand over to the United States the recovered black boxes of a Boeing 737 that crashed Wednesday just outside Tehran, killing all 176 passengers and crew.
Boeing, the manufacturer of the crashed plane, is American-owned.
The refusal of Iran to allow the US to participate in the investigation may not be unconnected to rising tension between the two countries following a series of activities during the past week.
A US drone strike authorised by President Donald Trump had killed Qasem Soleimani, the head of Iran’s Islamic Revolutionary Guard Corps’ Quds Force just outside the Baghdad Airport in the Iraqi capital on Friday.
The killing of the top general provoked angry reactions from the Iranians, who promised to provide “severe revenge”.
On Friday, Iran hit two airbases used by the US in Iraq with about 22 missiles, describing it as a “revenge for the martyrdom of Souleimani”.