Afghanistan will hold a second round of its presidential election on 7 November, electoral officials say.
The run-off will take place between President Hamid Karzai and his main rival Abdullah Abdullah.
The announcement comes a day after a UN-backed panel said it had clear evidence of fraud in the first round of polling in August.
Initial results suggested Mr Karzai had received 55% of the vote, and ex-Foreign Minister Mr Abdullah 28%.
Source: BBC