An international forensic audit says at least $1.48 billion is missing from Nigeria's oil revenues — far less than the $20 billion alleged by the former Central Bank governor.

The report by PricewaterhouseCoopers covering January 2012 to July 2013 is an indictment of the state-owned Nigerian National Petroleum Corp.

President Goodluck Jonathan received what he called the "voluminous" report on Wednesday and promised to publish key findings. A copy of the findings was made available to The Associated Press on Thursday.

The auditors also questioned $3.38 billion in alleged subsidies for kerosene charged by the petroleum corporation although a presidential directive ended the subsidy in 2009.

Jonathan fired Central Bank governor Lamido Sanusi a year ago after Sanusi created a scandal alleging $20 billion in oil revenues was missing.