However, Wafula Chebukati Chairman of Independent Electoral and Boundaries Commission (IEBC) on Thursday denied the vote counting systems had been hacked, but he revealed that there was an unsuccessful attempt to do so.
He said the electoral commission is verifying electronic online reporting with the physical ballot forms from polling stations.
The National Super Alliance obtained data showing former Prime Minister Raila Odinga won more than eight million ballots in the vote, compared with 7.75 million for President Uhuru Kenyatta, Musalia Mudavadi, a leader of the coalition, told reporters yesterday in the capital, Nairobi.
In addition to a new president, Kenyans are electing lawmakers and local representatives, the result of a 2010 constitution that devolved power and money to the counties, reducing the "winner takes all" nature of the presidential race that helped unleash previous ethnic violence.
Mudavadi's claims echoed similar accusations tabled by Odinga on Wednesday when he described the counting process as a "sham" and said hackers had broken into the tallying systems and interfered with the results.
The election commission has defended its electronic voting system as secure.
Worldwide observers say they have not noted any signs of interference with the vote.
Small-scale protests erupted in the slums of Nairobi and elsewhere in the country and police shot dead at least two protesters they accused of looting.
Between 28 December, 2007, and 28 February, 2008, at least 1,000 people died and 600,000 were displaced from their homes, after President Mwai Kibaki was declared the victor and Odinga rejected the polls as rigged.
"You can not claim that results are fake with respect to presidential vote and you welcome the areas where your governors and MPs have won convincingly".
He said the opposition's hacking complaints should be looked into by the IEBC, saying this was not the mandate of observers. Provisional results show Kenyatta holding a strong lead with 97.5 percent of polling stations counted after Tuesday's vote.
The electoral commission says hackers tried but failed to break into the server.
Meanwhile, Kenya's electoral commission has warned the opposition that its claims of victory for its presidential candidate, Odinga, could be deemed illegal.
"I did not have any problem with the process asides the fat that the materials came slightly late to my polling station".
"We are trying to plead with them to wait for the issue of the result to settle", he said.
Firstly, Form 34A is the first form used to tabulate results of the presidential election.
Odinga, who was accompanied by his running mate Kalonzo Musyoka and other NASA leaders, claimed the results being released by the IEBC have been doctored to give the incumbent, President Uhuru Kenyatta of Jubilee, a lead.
This time, Odinga invoked the unsolved torture and murder of top election official Chris Msando days before the vote to justify his rigging fears.
It's just a pity that instead of fighting corruption and investing more in the country, something that would benefit everyone, including the corrupt, instead they prefer to take everything they can and put it in their own pockets.
Commonwealth observer mission head and Ghana's ex-President John Mahama said there was no reason to doubt the commission's ability to deliver a "credible election".
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