It is said that the case is an attempt to turn negative attention back to Washington and away from them for shooting down a commercial airliner.
Iran says it will take Donald Trump to the Hague over the US drone strike which killed top general Qassem Soleimani.
Tehran wants to file a war crimes lawsuit at the International Court of Justice after the Quds Force commander was killed in Iraq on January 3.
The US does not accept the court's jurisdiction but the case could become an embarrassment for Washington if judges find in favour of Iran, which they have done in the past.
UN investigator Agnes Callamard - who wrote a damning report into the death of Saudi journalist Jamal Khashoggi last year - has said that Soleimani's killing 'most likely violates international law'.