More details are being revealed about the terrorist attack at the LynnMall in Auckland.

It's been revealed the perpetrator had been in court last month for planning an attack.

Auckland mayor Phil Goff told Heather du Plessis-Allan he is frustrated about the details not able to be revealed just yet due to suppression that even the Prime Minister has to adhere by.

"I would hope that the new legal advice or decision by the court is that we are given access to all of that information which we as New Zealanders probably have the right to know."

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