Opposition Leader Sussan Ley denies being behind leaks critical of a leadership aspirant as Labor seizes on internal divisions within the coalition.

Comments by former Liberal leader Peter Dutton for the party's election review taking aim at the performance of Andrew Hastie were leaked to the media days after the West Australian MP quit the front bench in order for him to speak more freely on immigration policy.

Mr Hastie has been touted as a future leader of the Liberal Party, but the opposition leader said she was "absolutely not" behind the leak.

"I've obviously explained to my party room processes that related to the review, and there have been take outs by the media and commentators as you would expect," she told Nine's Today program on Thursday.

"I don't go into those internal co

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