The Victorian government is refusing to release internal reviews by corrections authorities of their management of Brighton siege terrorist Yacub Khayre.
The state government had Corrections Victoria investigate the management of Khayre, who was on parole when he killed hotel clerk Kai Hao, 36, and took an escort hostage at a Brighton apartment building on June 5.
Parliament's upper house passed a motion to make the review public.
However, in a letter to the Legislative Council clerk, Attorney-General Martin Pakula said the government would not be releasing the documents because it would reveal high-level, confidential processes of the executive government.
Opposition corrections spokesman Edward O'Donohue told reporters on Tuesday the report should be released with the appropriate redactions "so the community can have confidence that the failings that led to the Brighton siege have been addressed or will be addressed."
In a statement, a spokesman for Corrections Minister Gayle Tierney said the practice of not releasing reviews was "standard practice" and "adhered to by the former Liberal government."
"Disclosure of the review is irresponsible and dangerous and could prejudice legal proceedings," he said.
Victoria's coroner is examining the attack and several people are proceeding through the courts charged with supplying Khayre with a sawn-off shotgun.
The corrections review has been provided to the coroner and an expert panel on terrorism.
