Queensland Parliament says it will urgently investigate whether informants have been put at risk by the accidental release of documents from the Fitzgerald inquiry.
The Crime and Misconduct Commission (CMC) says some documents from the Fitzgerald inquiry were accidentally released because of an "administrative error".
The Parliamentary Crime and Misconduct Commission (PCMC), which oversees the CMC, says it will urgently investigate the public release of the sealed documents, which was over 40 years ahead of schedule.
PCMC chairwoman Liz Cunningham says it is a serious situation.
Ms Cunningham says the Commissioner of the PCMC, Paul Favell, has been asked to make sure no protected sources have been put at risk.
"It's very important - and the committee feels it is very important - that people who were involved in the Fitzgerald inquiry and did so at some risk to themselves, can have confidence in the safekeeping of that information," she said.
"We've got to make sure that all avenues are covered in relation to those concerns.
"There'll be issues to consider in relation to what information's been accessed over what timeframe and by what range of people."
Mr Favell has been asked to submit a preliminary report quickly, but he has not yet been given a deadline.
The CMC is also investigating the leak internally and will prepare a report for the parliamentary committee.
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