US President Donald Trump has lashed out at what he describes as ignorant and insulting statements released by Iran after new sanctions against the Middle Eastern nation.
The tweets came after Iran's President Hassan Rouhani said the move proved the White House was mentally retarded.
Mr. Trump said it showed Iran's leaders do not understand reality.
He unveiled the sanctions on Monday, saying they were a response to recent aggressive behaviour by Iran.
The sanctions target a number of individuals, notably Iran's Supreme Leader, Ayatollah Ali Khamenei, who Mr. Trump said was ultimately responsible for the hostile conduct of the regime.
The US has alleged Ayatollah Khamenei has access to vast wealth which helps fund the Islamic Revolution Guard Corps.