A Papua New Guinean governor is calling for Australian support, to help quell a deadly spate of tribal violence. In the last month, several disturbing videos have emerged from Enga province in the country's highlands. Tribal conflicts have intensified in the region since PNG's national election last year, resulting in the displacement of tens of thousands. Local authorities estimate 70 people have been killed in Enga in just the past month, and the police have received authorisation to use "leth