Asylum seekers at the core of Manus Island detention centre rape allegations are now in Australia, as investigations continue.
The Department of Immigration has been examining a whistleblower security guard's claim that some asylum seekers had been raped and tortured while in detention in Papua New Guinea.
Immigration Minister Tony Burke said one alleged victim had been transferred to Australia, while a possible second victim had volunteered to return to his home country.
The alleged perpetrators had also been sent to an Australian detention centre.
"We don't have names for all the people," Mr Burke told ABC TV on Thursday.
The first victim did not make a police complaint in PNG, Mr Burke said.
"I don't want to imply the fact that he did not make a complaint to the police... means that his claims don't have merit," Mr Burke said.
"There's a whole context which has to be sensitively unpicked... a context which is not unusual for sexual assault cases."
Mr Burke said there were some questions about how sensitively the matter was handled in the first instance so he was not rushing the process.
"I... don't want to throw fresh police officers at him in Australia."
Mr Burke flagged that the secretary of his department would be making an announcement about the issue soon.
He said women and children would not be sent to Manus Island until appropriate facilities were in place to protect them.
Meanwhile, Mr Burke admitted he was uncomfortable about the release of propaganda footage, which was filmed by his department and showed asylum seekers crying after being told they would not be resettled in Australia.
However, he said its release was warranted because lives were at stake and people needed to be discouraged from taking the dangerous boat journeys.
"If it was only for a domestic audience in Australia I would never allow to be released. Never!" he said.
"We are trying to reach people (asylum seekers) in the pipeline before they board a vessel."
Asked who was winning the "race" with the coalition to be the most cruellest to asylum seekers, Mr Burke said:
"I'm not in that race, if there's someone in that race, they're not racing me."
"Being as tough and cruel doesn't make a difference... it's whether or not you take away the product people are paying for."
Forty mainly Iranian and Afghan single men, the first group of asylum seekers to be subject to the Rudd government's PNG deal, arrived on Manus Island on Thursday.
More asylum seekers are expected to arrive in PNG on Friday.
