A former Labour leader's broken ranks with his Party, in supporting AUKUS pillar two.

Former Defence Minister Andrew Little has claimed the current Government is right to investigate the military intelligence-sharing agreement with the US, the UK, and Australia.

Little says the nation needs to update its defence technology to address possible threats.

"There are threats in our region that are new, and are real - and we have to equip our Defence Force. Where we get that technology to equip them is the question, and in that respect, AUKUS is probably relevant."

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