Breaking: 'ISIS bride' accused of owning a slave in Syria refused bail

Zeinab Ahmad has been charged with enslavement and use of a slave. (Illustration: Anita Lester)

A woman accused of slavery offences while she was in Syria supporting Islamic State has been refused bail.

It is alleged Zeinab Ahmad's father bought a Yazidi teenager for $US10,000 and kept her as a slave.

A court has heard the alleged victim described Ms Ahmad as the "deputy" of the house.

A woman accused of slavery offences while supporting the Islamic State group (IS) in Syria has had her bail application refused.

It is alleged Zeinab Ahmad ordered a slave to do chores and prevented her from leaving the house, after the accused's father purchased the Yazidi teenager for $US10,000 and forced her into sexual servitude.

Ms Ahmad was among two groups of women, referred to by media as "ISIS brides", who returned to Sydney and Melbourne last month along with their children.

The court heard the alleged victim described Ms Ahmad as like the "deputy" of the house.

While the AFP allege Ms Ahmad badly "mistreated" the girl, it is not alleged she physically assaulted her.

Chief Magistrate Lisa Hannan said "exceptional circumstances" were needed for bail given Ms Ahmad's past support of IS.

The chief magistrate said the accused had said through others that she "renounces Islamic State and all violent extremism" but there was "no compelling evidence of her renunciation".

Ms Ahmad is facing two slavery charges, each carrying a maximum sentence of 25 years.It's the first time that crimes against humanity have been tested in the Australian judicial system, with each of the two charges carrying up to 25 years' jail.

The AFP argued Ms Ahmad had not renounced her support for IS and posed an unacceptable risk to the community if she were released on bail.

Prosecutors pointed to social media posts from Ms Ahmad where she shared Islamic State propaganda, celebrated the execution of a Jordanian pilot who was burned alive, and gloated that only "three out of 200" Australians that joined IS had decided to leave.

Australian Federal Police have argued in court that Zeinab Ahmad had not renounced her support of Islamic State. (ABC News: Christopher Gillette)

"There is clear and objective evidence from the time when the applicant was in Syria, in Islamic State territory, of her support for and her endorsement of Islamic State ideology," prosecutor Andrew Sprague said

Defence barrister Grace Morgan accepted there had been no "explicit" renunciation but told the court Ms Ahmad despised IS and the "men who enforced its ideals on her".

Ms Ahmad's defence team said her clie