Helpers are trying to rescue people buried by the landslide. PHOTO/ReutersAbout 670 people are estimated to be buried under a massive landslide in Papua New Guinea, a UN official says. The head of the International Organization for Migration in Papua New Guinea, Serhan Aktoprak, said the impact of Friday's landslide in the country's isolated Enga province was greater than initially thought. Papua landslideThe landslide happened at around 03:00 local time on Friday (17:00 GMT on Thursday), when people were more likely to be sleeping. Debris from the landslide, which includes large boulders, trees and displaced soil, is up to 8 meters (26ft) deep in some areas.