The motion was attended by the family members of the deceased victims.

Abbott described the tragedy as a "horrific experience" that would not be forgotten by the Australian people."Every day must be a struggle. We grieve with you," he said, as he looked up to the public gallery.

Abbott said measures would be implemented to ensure that such an act did not occur anywhere in the country again. His comments came a day after siege victim Marcia Mikhael slammed the rescue operation, claiming that although police did the best they could in the situation, they were disorganised and not properly equipped.

"I know there are a lot of officers who risked their lives to be there and I thank them from the bottom of my heart. I just think that maybe the Army would've been better, more appropriate to be handling this situation," Mikhael said.

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