The Papua New Guinean government has banned Australians from travelling to Bougainville.

The ban comes after Australia's announcement that it planned to build a new diplomatic mission in the capital, a move that was slammed by PNG officials.

Papua New Guinea Prime Minister Peter O'Neill gave a talk at the Lowy Institute in Sydney last Thursday. Credit:AFP

On Monday PNG's Minister for Foreign Affairs and Immigration Rimbink Pato said the stringent measure would take effect immediately.

"I have instructed the Chief Migration Officer to impose the ban with immediate effect and to notify all PNG Overseas Missions and Posts and domestic carriers of the ban," he said in a statement.