Two Australians killed in NZ chopper crash

A helicopter crash in New Zealand's South Island has killed two Australians and four people from Britain, local police have confirmed.

Fox Glacier - river of ice cutting through glacial valley nestled amidst mountains covered by primeval rainforest Source: AAP

Two Australian and four British tourists are among the seven killed in a helicopter crash at a popular New Zealand tourist site.

Worsening weather and treacherous terrain have halted police efforts to reach the bodies of the victims in the Fox Glacier crash on Saturday.

But police have confirmed the dead include two Australians and four people from the United Kingdom.

They have yet to be formally identified.