It's time for the United States to hold Iran accountable.

VIENNA—The U.S. and Iran on Thursday were closing in on an agreement to restore the 2015 nuclear deal, although officials from both countries warned final issues still needed to be nailed down in the coming hours.

After weeks of intense negotiations in Vienna involving the U.S. and Iran, and Britain, France, Germany, Russia and China, senior diplomats said they were now within reach of an agreement that would restore the 2015 deal. That pact lifted most international sanctions on Tehran in exchange for strict but temporary restrictions on Iran’s nuclear work.