In what he called an “attack on our democracy”, Mr Odinga claimed hackers used the identity of murdered election official Chris Msando to “create errors” in the country’s electoral database.

Mr Odinga’s allegations “boil down to a claim that returning officers were supposed to submit a scan of their results to the Independent Electoral Boundaries Commission,” said Sky’s Foreign Affairs Editor Sam Kiley, who reported from Nairobi.

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He added, “Mr Odinga alleged he had proof that he had more than a million votes that had been officially logged because the forms had not been scanned but results sent to the board by text.

“This, he said, allowed for manipulation by hackers who got into the national system overnight using Mr. Msando’s passwords and profile.”

Of Kenya’s population of 48 million, 19 million were registered to vote in elections that are also choosing members of parliament and local representatives in the country’s devolved counties.