The United States intends to fully enforce sanctions due to be reimposed against Iran early this week on orders from U.S. President Donald Trump, Secretary of State Mike Pompeo said Sunday.

Washington's so-called "snapback" sanctions are due to be reinstated against Tehran at 12:01 a.m. EDT on Tuesday, a U.S. Treasury official said, speaking on condition anonymity.

Pompeo, speaking with reporters returning with him from an Asian trip, said the White House will detail implementation of the measures Monday morning.