Any suggestions of a joint New Zealand and Australian Anzac unit that would see combat in Iraq against Islamic State are "fundamentally wrong", Prime Minister John Key says.
However an Anzac badged joint training force remains a possibility.
Australian media this morning reported New Zealand and Australia had been in talks right up to the prime ministerial level about a joint force to serve in Iraq, a century after the first Anzac force was created.
Sydney's Daily Telegraph said it was estimated that a further 400 Australian specialist soldiers could be sent, along with an as-yet-unknown number of New Zealand troops.
Mr Key has indicated New Zealand will contribute to efforts to combat IS with as training role likely for New Zealand personnel but his Government has yet to confirm the exact form of assistance.