I recommend Miriam Ticktin's interesting comment that points the way toward a broader concept of "sanctuary," which includes this thought-provoking paragraph:
The Australian government has been criticized for a raft of its asylum seeker policies, perhaps the most notorious of which is its removal of “unlawful non-citizens” to two offshore processing centers—one in Manus Island in Papua New Guinea and the other in the Republic of Nauru—and the protracted detention of asylum seekers in those facilities. This is an ongoing human rights concern. Notwithstanding the government’s announcement late last year that it would settle some of these detainees in the United States, the Prime Minister has said that that arrangement is a “one-off”; it will not be repeated. The Immigration Minister has stated that the offshore detention policy will not change and that Nauru, at least, “will remain in its current status forever”. In any event, the fate of the US-Australia deal is anything but certain, after President Trump blasted it as the “worst deal ever”.