The children of Australian terrorist Khaled Sharrouf could expect to return to Australia if their grandmother succeeds in extracting them from Syria, her lawyer says.
The grandmother, Karen Nettleton, is in Turkey in an attempt to retrieve the children and bring them home to Australia.
Ms Nettleton's Sydney barrister, Charles Waterstreet, said Ms Nettleton had received support from Australian authorities and "everyone is on alert to reintegrate them". 
He said the children were Australian citizens and the law was clear that they had a right to return.
"The Australian government has a duty to assist them to get back. The baby will need to get papers," Mr Waterstreet said.
"We have had nothing but co-operation from all federal departments.
"And we would hope that their re-entry if, God bless, it happens - assuming the best, we would expect the authorities to do what they said they would do - [would] keep them together and keep them integrated and keep them safe."
Mr Waterstreet said the children would co-operate with any intelligence gathering if they arrived in Australia.
The Minister for Foreign Affairs, Julie Bishop, said Australia had "very limited" capacity to provide any consular assistance in Syria.
"The Australian government has been in contact with the representatives of the family, but this is a very tragic case and underscores the government's position that Australian citizens should not travel to the areas of conflict in Syria and Iraq," she said.
"We do not have an embassy in Damascus and it is against the law for an Australian citizen, without lawful reason, to be in Al-Raqqa and parts of Iraq.
"So it's a very difficult situation. But we have been working with representatives of the family."
Asked if the children would be allowed to settle in Australia if they returned, Ms Bishop said "that would be a matter for our law enforcement agencies to consider at the time".
Ms Bishop said she was not in a position to comment on the circumstances of the children.
Sharrouf's 14-year-old daughter has insisted her father is dead, reportedly speaking for the first time about her "normal" life in Syria with her new baby and four younger siblings.
Zaynab Sharrouf would not confirm her location in Syria, describing it as "dangerous with the drones", but said, in an interview with The Daily Telegraph, she knew "for sure that [he] is dead".
The teenager talked about her life in Syria and said the terrorist father of her baby, Mohamed Elomar, was also dead.
Zaynab reportedly married Elomar, her father's friend and a former Sydney boxer, before having his child. It is understood he was killed in an air strike.
In the social media exchange with the newspaper early this month, Zaynab reportedly said her life was "fine, [it's] normal".
She said she had heard of claims her father was still alive, but said "we know for sure he's dead. It was confirmed ages ago".
"Who would you believe, the media that like to make lies or his family who witnessed it?"
Her mother Tara Nettleton died in   September after complications from an appendix operation.
"I'm in contact with my grandmother thankfully, I try and speak to her as much as I can. I send her photos as well," Zaynab reportedly said in the internet exchange.
She is living in Syria with her siblings Hoda, 13, Abdullah, 11, Zarqawi, 10, Humzeh, 5, and her three-month-old daughter, Ayesha. All the children are said to be wards of the Islamic State.
In a chilling image with his father, Abdullah was photographed holding a severed head in 2014.