Update: Papua New Guinea says it will close an Australian immigration centre on a northern island after its Supreme Court ruled it unlawful. Australia has ruled out accepting more than 800 asylum seekers detained there.

The federal government is seeking advice from Papua New Guinea on its response to a Supreme Court ruling that Australia’s practice of detaining asylum seekers on PNG’s northern Manus Island is unconstitutional and illegal.

Today, Immigration Minister Peter Dutton said the 800 men detained on Manus would not be resettled in Australia under any circumstances, maintaining Australia’s hard-line immigration policies that have been criticised by the United Nations and human rights agencies for harsh conditions.

Papua New Guinea’s Supreme Court on Tuesday ruled that the detentions breached the country’s constitution and must be stopped.

“In terms of the regional processing centre on Manus, it’s part of PNG territory obviously, and the decision of the Supreme Court is one which binds the PNG Government, not the Australian Government,” Mr Dutton told ABC radio.

“But we will work with a close partner in PNG, because we are as determined as ever to make sure these (asylum seeker) boats don’t restart.”

Under Australia’s controversial immigration laws, anyone intercepted while trying to reach the country by boat is sent for processing to camps in Nauru and Manus Island. They are never eligible to be resettled in Australia.

Mr Dutton said that stance would not change. He added that Manus detainees could return home or go to another country willing to accept them.

– with other agencies