Prime Minister John Key says he received an intelligence report just before Christmas that a boat from Indonesia with hundreds of asylum seekers was planning to head to New Zealand.
He also revealed that the Australians have considered whether they would help shepherd a boat across the Tasman to New Zealand if the people on board were adamant about getting to New Zealand.
Mr Key was speaking at his post cabinet press conference about the deal he has made with Australian Prime Minister Julia Gillard to take 150 approved refugees a year from Australia - people who have been processed in Nauru or Manus Island in Papua New Guinea.
He said New Zealand had to pull its weight and that the possibility of a mass arrival in New Zealand was real. He was dealing an instance just before Christmas.
"I can't publicly release a lot of information, even under the [Official Information Act], for obvious reasons but what I can tell you is that I get more than enough correspondence from my intelligence agencies fed from the Australian intelligence agencies to tell you that this situation and the likelihood of a boat wanting to come to New Zealand is very real and very alive and I was dealing with it just before my Christmas holidays."