Concerns police aren't doing enough to stop sorcery killings in PNG

There are calls for action over sorcery killings in Bougainville in Papua New Guinea and there's concern police aren't doing enough. Earlier this month, two men in the Bana district were hacked to death by members of a rival clan - who claimed the men used sorcery against them. Worldwatch reporter, Perlian Lau, spoke to Don Wiseman from RNZ Pacific.