Kenya's government has described as not credible a leaked report which allegedly says former President Daniel arap Moi stole millions of dollars.
Mr Moi (l) has backed the election bid of President Kibaki (r)
The report was commissioned by the current government soon after it was elected in 2002 but never published.
Government spokesman Alfred Mutua said the 2004 report was based on hearsay and was incomplete and inaccurate.
According to the leak, it says Mr Moi, his family and associates plundered as much as $2bn from the taxpayer.
The report was allegedly leaked to a website Wikileaks which exposes corruption.
It is claimed the money was invested in businesses, banks, property, and deposit accounts throughout the world.
Former President Moi has been unavailable for comment.
Earlier this week, Mr Moi announced he was backing the re-election campaign of President Mwai Kibaki, who defeated Mr Moi's preferred candidate in the 2002 elections.
Mr Mutua said the leak was "meant to score political points against Kibaki".
"This report touches on at least 50 individuals - why did they just isolate the Moi family? It's a political gimmick."
Correspondents say the former leader, who ruled Kenya for 24 years, still wields great political influence.
President Kibaki came to power promising to rid the country of corruption and one of the government's first acts was to commission the report by business consultants Kroll Associates.
However, the BBC's Adam Mynott in Nairobi says Kenya remains mired in corruption and the current government itself has been rocked by a multi-million dollar scandal.