Iran has said it will not hand over black box flight recorders recovered from a plane that crashed with 176 people on board to manufacturer Boeing or to the US.
US President Donald Trump says Iran "appears to be standing down" after it targeted air bases housing US forces in Iraq.
Iran's Supreme Leader Ayatollah Ali Khamenei has called his country's missile strike on US targets in Iraq a "slap in the face" for the United States and said that Washington's troops must leave the region.
Iranian rescue workers found a black box from the crashed Ukrainian airliner on Wednesday, Iran’s state broadcaster IRIB reported.
President Donald Trump reacted on Tuesday to a series of missile strikes on American targets in Iraq.
Two airbases housing US troops in Iraq have been hit by more than a dozen ballistic missiles, according to the US Department of Defence.
Forty people have been killed in a stampede as Iranians flocked to the burial of a top commander killed in a US drone strike, officials say.
President Trump has threatened severe sanctions against Iraq after its parliament called on US troops to leave the country.
Thousands of mourners swept into the Iranian city of Ahvaz early on Sunday morning to receive the remains of Qasem Soleimani, the general killed in a US drone strike in Baghdad last week.
Russia's unmanned Luna-25 spacecraft has crashed into the Moon after spinning out of control, officials say.
Donald Trump has confirmed that he will not take part in Republican presidential debates with his rivals in the race for the White House.