ICAC investigation into Daryl Maguire, Gladys Berejiklian extended

The corruption investigation that ended the political career of Gladys Berejiklian has been extended.

The Independent Commission Against Corruption (ICAC) was due to release a report into Operation Keppel, focused on Berejiklian's partner Daryl Maguire.

But ICAC announced today Assistant Commissioner Ruth McColl's will remain with the commission when her official appointment ends on Monday.

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"Ms McColl's services are required for the purposes of her finalising the Operation Keppel report, including participating in the review and editing processes of that report," a statement from ICAC read.

"The Commission is conscious of its obligations under section 74(7) of the ICAC Act to furnish investigation reports as soon as possible after it has concluded its involvement in a matter."

ICAC did not give any explanation for the delay in Operation Keppel.

Operation Keppel is investigating allegations that Maguire breached the public trust and used his position as a member of NSW parliament to improperly gain a benefit for himself or others close to him.

Maguire served as the Liberal member for Wagga Wagga from 1999 to 2018.

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For seven years, Maguire had been in a secret relationship with Berejiklian, including after she was elevated to premier.

Last October Berejiklian resigned as premier after ICAC announced she was also being investigated.

Berejiklian has denied any wrongdoing.

She quit parliament in December last year, and is now working for Optus.