Iran-US prisoner swap appears in motion as nearly $6B in once-frozen Iranian assets reaches Qatar

Iran and the United States will exchange prisoners on Monday after nearly $6 billion in once-frozen Iranian assets reached Qatar, a key element of the planned swap, officials said.

Despite the deal, tensions are almost certain to remain high between the U.S. and Iran, which are locked in various disputes, including over Tehran’s nuclear program. Iran says the program is peaceful, but it now enriches uranium closer than ever to weapons-grade levels.

Iranian Foreign Ministry spokesman Nasser Kanaani was the first to acknowledge the swap would take place Monday. He said the cash sought...