BBC: Iran's chief negotiator with the West over Tehran's nuclear programme, Ali Larijani, has resigned.
A government spokesman said Mr Larijani had repeatedly offered his resignation and President Mahmoud Ahmadinejad had finally accepted it.
Mr Larijani had differences with the president over how to proceed with the negotiations, correspondents say. Iran’s nuclear negotiator resigns (more)
WATCH BBC VIDEO:
Factors that may have led to Larijani's resignation
Mark Alexander
