Four British tourists and two Australians are thought to be among seven people killed in a helicopter crash in New Zealand.

It came down on Fox Glacier - which is one of the country's best-known tourist spots on the remote west coast of the South Island.

A picture released by police shows the wreckage in an ice crevasse.

Inspector John Canning is from Tasman District Police:

Susan Burgess is a reporter for TV-NZ and says the rescue could take some time: