Joint Comprehensive Plan of Action

The United States and Iran sought Nov. 23 to bridge gaps in negotiations on the eve of a deadline for a nuclear deal, as Iran signalled it was open to extending the talks by up to a year.

U.S. Secretary of State John Kerry went into a fifth round of talks in Vienna with his Iranian counterpart Mohammad Javad Zarif ahead of the Nov. 24 deadline.

Iran and world powers met in Muscat Nov. 11 amid growing signs that a long-bargained deal on Tehran's nuclear programme will not be struck by a November 24 deadline.