By Wade Sellers For Daily Mail Australia
Published: 04:29 GMT, 16 March 2019 | Updated: 04:29 GMT, 16 March 2019
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A global security expert has slammed New Zealand authorities over Christchurch's mosque massacre on Friday.
Joe Siracusa branded the attack that killed 49 people a 'catastrophic failure of intelligence'.
Prof Siracusa told A Current Affair it was 'absolutely unbelievable' that accused gunman Brenton Tarrant wasn't being monitored.
'I wonder if he was on an Australian watchlist and they didn't send the file over to New Zealand,' he said.
Prime Minister Jacinda Ardern has since stated that the people arrested in relation to the attack were not on any terrorism watch lists.
Prof Siracusa wondered how Tarrant was able to broadcast his intentions on social media, including links to white supremacy groups and images of guns in the lead up to the attacks as well as releasing a 73-page manifesto.
He also raised his concerns over the fact that Tarrant wasn't a lone-wolf in the attacks and that he was working with other people and still wasn't reported.
