A senior US official acknowledged that Iran nuclear talks will go past tomorrow’s target date, as Iran’s foreign minister prepared to head home Sunday for consultations before returning to push for a breakthrough.

A British-Iranian woman held in a Tehran prison for more than three months after going to a men’s volleyball match has gone on hunger strike, her family have revealed.

US Secretary of State John Kerry and foreign ministers of other major powers converged today to lend their weight to the Iran nuclear talks after envoys reported progress on key issues blocking an interim agreement to curb the Iranian programme in return for limited sanctions relief.