04/27/2013 01:50 EDT | Updated 06/27/2013 05:12 EDT

Top court's review into Constitution allegations unacceptable: Quebec

MONTREAL - Quebec's deputy premier says he's not satisfied with an investigation into allegations that some the Supreme Court of Canada justices intervened in the patriation of the Constitution.

Canada's top court announced on Friday that it had completed a review of its records and found no documents related to the allegations.

The court launched the review after the recent publication of a book that alleges two of its former justices interfered in the political process and engaged in backroom discussions.

Francois Gendron, the Parti Quebecois' deputy premier, says the allegations are very serious and the court's decision to end the review is unacceptable.

Gendron says he's convinced there is truth to the story and says the Quebec government is looking at other options to get to the bottom of it.

For the moment, Gendron says the Quebec government has ruled out legal action to find out more.

"We will do everything we can, in other ways, to take this (investigation) further," Gendron said Saturday.

The controversy stems from a new book "La bataille de Londres," by historian and journalist Frederic Bastien.

In the book, Bastien writes that Bora Laskin, then chief justice of the Supreme Court, provided information to the Canadian and British governments on the discussions between the justices about the legality of repatriation.

Bastien based that account on British government documents he got under the United Kingdom's freedom-of-information laws. He also claims another high court judge, Willard Estey, also secretly advised the British government in 1980 that the Supreme Court would address the issue.

Bastien suggests that both jurists violated the principle of separation of executive and judicial powers.