Partial results from Afghanistan's presidential election show incumbent Hamid Karzai has extended his lead, BBC reported.
With three quarters of votes counted, Mr Karzai had 48.6%, followed by Abdullah Abdullah with 31.7%.
Both have claimed victory after the 20 August poll, which has been marred by fraud allegations.
Some results have been annulled due to irregularities, officials said. The winner needs to secure an outright majority of 50% to avoid a run-off.
Independent Election Commission (IEC) official Daud Ali Najafi said results from 447 of about 28,000 polling stations had been annulled, following fraud investigations.
He told Sunday's news conference in Kabul that out of 4.3m valid votes, Mr Karzai had so far won 2.08m and Mr Abdullah 1.36m.
Another presidential candidate, Ramazan Bashardost, was a distant third, with 457,909 ballots.
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