The local MP, William Samb, said two bodies had been recovered. But 15 people, including three children, were still missing.
Locals were working with whatever tools they had to try to recover people, but he said there were unlikely to be any survivors.
The slip happened in the early hours of Monday near an alluvial mine camp. Photo / Supplied, RNZTools including spades, bush knives and chainsaws along with food rations were being flown to the valley, EMTV reported.
The landslide happened in the early hours of Monday, sweeping away makeshift shelters on the ridge.
Samb said he believed days of continuous rain, along with the clearing of the forest by miners, had contributed to the disaster.
Heavy rain has hampered recovery efforts, and there are fears the slip could have created a dam which now imperils downstream villages.