A panel probing fraud claims in the Afghan election has found Hamid Karzai did not gain enough valid votes for an outright win, the BBC understands.

The UN-backed Electoral Complaints Commission (ECC) has ordered that ballots from 210 polling stations be discounted.

The BBC's Lyse Doucet spoke to Grant Kippen, Chairman of the ECC, about his team's findings and their possible impact on the presidential election results.

Under poll rules, Mr Karzai now faces a runoff against rival Abdullah Abdullah.