The commission reported that Karzai won 54.6 per cent of votes on Thursday, Aug 20 polls, which was twice the 27.8 percent of his nearest rival,Abdullah Abdullah, the former foreign minister.
Daoud Ali Najafi, chief electoral officer said round 38 per cent votes cast, 42 percent were men and 38 percent were women
He added that election body prepared ballots for more than 15 million eligible voters.
The European Union (EU) election monitors said that up to 1.5 million votes, one quarter of all ballots were supposedly tampered.
The Independent Election Commission (IEC), which conducted the poll, said the candidates can lodge complaints with ECC if they were unsatisfied with the election results.
Dimitra Ioannou, the deputy head of the EU monitoring mission, divulged that 1.1 million of the suspect votes were in favour of Karzai and 300,000 were cast for Abdullah.
However, she added, "All of them need to be investigated."