The U.S. said international sanctions on Iran are automatically "snapping back” in a move that most nations say the Trump administration doesn’t have the authority to demand since quitting a 2015 nuclear deal two years ago.

"Sanctions are being re-imposed on Iran,” Secretary of State Mike Pompeo said in a statement late on Saturday. "The United States expects all U.N. Member States to fully comply with their obligations to implement these measures.”

That’s unlikely to happen.