The United States on Sunday denied a report by Iran’s state television that the arch-foes had reached a prisoner swap deal in exchange for the release of $7 billion frozen Iranian oil funds under U.S. sanctions in other countries. Iranian state television said on Sunday that Tehran would free four Americans accused of spying in exchange for four Iranians held in the United States and the release of $7 billion in frozen Iranian funds. The U.S. government denied that an exchange was in the works. The state TV, quoting an unnamed Iranian official, also said British-Iranian national Nazanin Zaghari-Ratcliffe would be released once Britain had paid off a debt on military equipment owed to Tehran. A British Foreign Office official played down that report. Iran and world powers are holding talks ...