WELLINGTON, April 22 -- A senior New Zealand minister has sparked outrage by deriding a planned free trade deal with India as a "butter chicken tsunami".

Wellington is poised to sign a free trade agreement with India in New Delhi next week.

The New Zealand government has hailed it as a "once in a generation" deal that will give its businesses access to the world's most populated country's vast domestic market.

But its ruling coalition partner, the right-wing populist NZ First party, has pulled support over fears it will open the country's borders to thousands of Indian nationals.

The split will mean the government will need the opposition Labour Party to vote in favour when legislation goes before parliament in the coming months.

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