A white tiger mauled a zookeeper to death at a New Zealand wildlife park Wednesday as a group of tourists watched in horror, police say. The attack took place at the Zion Wildlife Gardens near Whangarei, about three hours north of Auckland. Two zookeepers had gone in to clean an enclosure at the park, when one of two white tigers inside lunged at a keeper, said Sarah Kennett, spokeswoman for Northland Police.