Australians in Papua New Guinea have been warned never to walk the streets of Port Moresby after dark and to exercise a high degree of caution.
Days after the Australian and PNG governments struck a deal to allow 230 Australian police into the country to restore law and order, the Department of Foreign Affairs and Trade upgraded its travel advice for PNG.
The department says the upgraded advice follows a sustained increase in security incidents involving Australians.
It says carjackings, bag snatching, armed assaults and robberies in shops and restaurants were common in the increasingly lawless country, while crimes were often violent and criminals armed.
The advisory says taxis and Public transport should be avoided as they were unreliable and dangerous due to poor maintenance and frequent robberies.
It urged Australians in PNG to register with the Australian High Commission in Port Moresby.
Last week the New Zealand Foriegn Affairs Department upgraded its advisory.