The source told AFP that the women, all accompanied by small children in the court, had surrendered to Kurdish peshmerga fighters after having fled Tal Afar, one of the last IS bastions to fall to Iraqi security forces last year.

The women told the court they had entered the country to join their husbands fighting for IS in the "caliphate" which the group declared in 2014 in territory straddling Iraq and Syria.

Iraq in February condemned another 15 Turkish women to death on the same charge.

Since January, a German woman and a woman from Turkey have also been handed the death penalty, in rulings which Human Rights Watch (HRW) has condemned as "unfair".

Experts estimate that a total of 20,000 people are being held in jail in Iraq for alleged membership of IS. There is no official figure.

Iraq has detained at least 560 women, as well as 600 children, identified as jihadist or relatives of suspected IS fighters.

Separately, authorities in Iraqi Kurdistan said in early February they had detained some 4,000 suspected IS members, including foreigners.

Iraq's anti-terrorism law empowers courts to convict people who are believed to have helped IS even if they are not accused of carrying out attacks.

It also allows for the death penalty to be issued against anyone -- including non-combatants -- found guilty of belonging to IS.

The New York-based HRW has urged Iraqi authorities to "develop a national strategy to prioritise the prosecution of those who committed the most serious crimes".

Women suspected only of IS membership rather than any combat role are "getting the harshest possible sentences for what appears to be marriage to an ISIS (IS) member or a coerced border crossing," it said.

Many foreign widows of IS fighters have said they had been fooled or threatened by their husbands to travel to Iraq.