Thousands protest Australia's refugee detention policy

Thousands of people marched across major Australian cities yesterday calling for an end to Canberra's offshore detention of asylum-seekers.

The government sends anyone who tries to enter the country by sea to camps on Papua New Guinea's Manus Island or on Nauru in the Pacific for processing.

Protestors took to the streets to mark the fifth anniversary of the policy's reintroduction, when in 2013 Canberra significantly toughened its stance, signing deals with the Pacific nations and declaring anyone arriving by boat had "no chance" of being settled in Australia.

"The policy that was introduced in 2013, to expel people -- the 'Fortress Australia' policy that they (the government) put in place -- that has to go," rally organiser Ian Rintoul from the Refugee Action Coalition told Sydney protestors.

"So we fight to close the detention centres on Manus and Nauru, but we fight in that process to bring them here."

Hundreds marched through Sydney shouting, "Free, free the refugees", with banners stating, "Five years too long, evacuate Manus and Nauru". Joint rallies were held in Melbourne, Adelaide, Brisbane, Canberra and Perth.

Canberra says its policy deters people from embarking on treacherous sea journeys, but rights groups and the United Nations have slammed the wealthy nation for turning its back on vulnerable people, as reports of abuse, suicide and despondency filter out of the camps.