Kerry says Iran talks useful, hopes Tehran will engage

Kerry, who was in Paris meeting the French president and his counterpart Laurent Fabius during a tour of Europe, repeated that Washington was ready to hold bilateral talks with Iran.

He added: "Iran knows what it needs to do, the president has made clear his determination to implement his policy that Iran will not have a nuclear weapon," he added.

(Reporting by Arshad Mohammed and Alexandria Sage; Editing by Alison Williams)