MELBOURNE, Australia (AP) — A Papua New Guinea government official has told the United Nations that more than 2,000 people are believed to have been buried alive by a landslide Friday. The official formally asked for international help. The government figure is roughly triple a U.N. estimate of 670 killed in the landslide in the South Pacific island nation’s mountainous interior. In a letter seen by The Associated Press to the United Nations resident coordinator dated Sunday, the acting director of the country’s National Disaster Center, Luseta Laso Mana, said the landslide “buried more than 2,000 people alive” and caused “major destruction” int Yambali village in Enga province. Estimates of the casualties have varied widely.