The Papua New Guinea Defence Force could start to take control of the Manus Island detention centre with about 600 men refusing to leave the site following its official closure yesterday.

Key points: Men say they do not feel safe at alternative accommodation

Men say they do not feel safe at alternative accommodation Final notice posted on Sunday warned the army would take control of the closed site from today

Final notice posted on Sunday warned the army would take control of the closed site from today Julie Bishop says it is not Australia's responsibility to protect the men

The refugees and asylum seekers are choosing to stay at the centre despite cuts to water, food and power supplies.

They say they do not feel safe at the alternative accommodation that is being provided.

Rohingya refugee Imran Mohammad told RN Breakfast he did not believe PNG authorities could protect them.

"We are not here for food, we are not here for electricity, we're not here for water, we're here because we're persecuted in our country we left violence. We want a safe country and we want our freedom," he said.

In a final notice posted by immigration authorities on Sunday night, the men were told the PNG Defence Force would start to take control of the site from today.

It warns the men anyone choosing to remain will be liable for removal from an active military base.

Today, PNG immigration authorities said they would not like to see the men forcibly removed.

The ABC was allowed access to the detention centre yesterday and one man described how contractors had cut pipes and emptied water tanks.

Refugees have been stockpiling water. ( Twitter: Nick McKim )

"We have cleaned the compound by ourselves," the man said.

Gesturing to a row of wheelie bins filled with water, he said residents were confident they could survive for at least a month.

Alternative accommodation is safe: Government

A Federal Government spokeswoman said the alternative accommodations of East Lorengau Refugee Transit Centre and West Lorengau Haus, and Hillside Haus were "safe and secure".

Buildings at the East Lorengau Refugee Transit Centre and West Lorengau Haus on Manus Island ( Supplied: Federal Government )

"[East Lorengau Refugee Transit Centre and West Lorengau Haus] is close to the town of Lorengau, is safe and secure, provides accommodation while [refugees] consider their future," she said.

"PNG will provide an allowance, but they will have to shop/cook/cater for themselves. There will be healthcare facilities and staff.

Inside the East Lorengau Refugee Transit Centre on Manus Island ( Supplied: Federal Government )

"[Hillside Haus] is a safe and secure facility to temporarily house non-refugees … it is an open facility, they can come and go as they please.

"They will continue to have catered food as they will not receive any allowance."

Hillside Haus on Manus Island has air conditioning, says the Federal Government. ( Supplied: Federal Government )

Political tug-of-war over responsibility

Acting Prime Minister Julie Bishop urged the men to leave the detention centre and to move to one of the other three other accommodation centres.

She said it was not up to Australia to guarantee their safety.

"Papua New Guinea is a sovereign government of a population of over 8 million people responsible for law and order and for security," Ms Bishop said.

Sorry, this video has expired Asylum seekers in Manus Island detention centre say they don't feel safe

That is at odds with a statement from PNG Immigration Minister Petrus Thomas earlier this week in which he said PNG also had no obligation to deal with asylum seekers found not to be refugees.

"PNG has no obligation under the current arrangement to deal with these two cohorts and they remain the responsibility of Australia to pursue third-country options and liaise with respective governments of the non-refugees for their voluntary or involuntary return," Mr Thomas said.

"There has to be a clear understanding of what Australia will continue and support PNG in the next few months to deal with the remaining caseload," he said.

But Greens senator Nick McKim said one of those facilities is not finished yet and he argued the other two do not have the standard of services that should be provided.

He has renewed his attacks on Immigration Minister Peter Dutton, calling him a "monster" a "racist" and a "fascist".

Mr Dutton hit out at the asylum seekers and at Senator McKim in a statement.

He disputed their claims that they are afraid to leave the detention centre, saying that up to 200 men had been travelling to the Lonengau township each day and some stayed in the town for extended periods of time.