All of Australia's detainees on Manus Island must be brought to Australia, Greens Immigration spokesperson Nick McKim says.

"The people the Australian government have locked up on Manus Island have suffered immense physical and psychological harm," Senator McKim said.

"Immigration Minister Peter Dutton's plan to just leave them to languish on Manus Island is unfair and unconscionable, and shows his determination to extend the humanitarian crisis for as long as he can."

Immigration Minister Peter Dutton must immediately clarify the status of medical care available to people seeking asylum on Manus Island.

"We are hearing that there are no doctors working today in the detention centres on PNG due to International Health and Medical Service failing to properly register its medical practitioners with the Papua New Guinean government," Greens Immigration spokesperson Senator Nick McKim said.

"If this is true, Mr Dutton must take urgent action to ensure proper medical care is available to people who remain Australia's responsibility." 

The government's improper management of Australian Border Force's statutory powers is squarely the fault of Immigration Minister Peter Dutton.

"This government has grabbed for itself a massive range of new powers in its process of militarising the Department of Immigration and Border Protection," Greens Immigration spokesperson Senator Nick McKim said.

"The failure of the Department to ensure that these powers are being used legally falls squarely on the shoulders of the incompetent Peter Dutton." 

The Greens will stand against the government's discriminatory anti-immigration agenda, and specifically against Minister Dutton's power grab through the Visa Revalidation Bill.

"This government has made it clear that they want to see an end to multicultural Australia," Greens Immigration spokesperson Nick McKim said.

"Peter Dutton, our anti-immigration minister, is seeking a further expansion of his powers so he can create two classes of Australian citizens, and undermine the security of all migrants living in Australia."

Immigration Minister Peter Dutton must immediately intervene so a pregnant woman on Nauru suffering serious health problems can receive medical assistance, Greens Immigration spokesperson Nick McKim says.

"I have today written to Mr Dutton seeking his urgent intervention in this case," Senator McKim said.

"Medical specialists have demanded that she be immediately brought to Australia to receive the care she so desperately needs."

"It is really sad that we need to ask the Immigration Minister to show basic humanity to people who are in his care."

Immigration Minister Peter Dutton's proposed visa changes are deeply xenophobic and a continuation of his attack on multiculturalism in Australia.

"This nothing less than a blueprint to return our country to the divisive days of the White Australia Policy," Greens Immigration spokesperson Nick McKim said.

"As the Department of Social Services noted, this proposal will 'undermine Australia's social cohesion' and create a two-tiered society."

"This will increase the risk factors that cause violent extremism."

It's time for Labor to grow a spine and reject the government's latest deliberate cruelty against refugees, Australian Greens Immigration spokesperson Nick McKim says.

"Labor should not need to wait for the legislation to land before deciding whether it has the strength to take a principled stand," Senator McKim said.

“They need to decide whether they are going to line up with the Coalition and One Nation, or whether they have the compassion and strength to vote this hateful legislation down.”

The Government has sunk to a new low in its latest attempt to punish innocent people seeking asylum, Australian Greens Immigration spokesperson Nick McKim says.

"The proposed new laws are an escalation of the cynical race to the bottom which sees our fellow human beings again used as a tool to seek domestic political advantage," Senator McKim said.

"This is about absorbing nothing more than One Nation votes."

"People are languishing on Manus Island and Nauru because of the government's incompetence and refusal to find a solution."

The Government continues to flail about with no solution for the stranded people in Australia's care on Manus Island, Greens Immigration spokesperson Nick McKim says.

"Two months ago, the Government pledged that the illegal Manus Island detention centre would close, and the men there would be resettled," Senator McKim said.

"It now appears that the Government is trying to weasel out of this commitment and the Papua New Guinea Supreme Court decision."