Members of the Yazidi
Yazidi women are subjected to abduction and systematic rape by IS fightersReuters

19 women have been executed for refusing to have sex with ISIS fanatics.

A Kurdish official revealed that the women were being held hostage in Islamic State's stronghold of Mosul, Iraq.

Said Mimousini, a spokesman for the Kurdish Democratic Party in Mosul told Iraqi News that the women were sentenced to death because they refused to "participate in the practice of sexual jihad".

The women were executed a few days ago. While it is not known whether they Yazidis or not, the abducted women of the Yazidi community have suffered the fullest extent of the brutality of Isis. The militant group stormed the Sinjar district in northern Iraq last year and captured hundreds of women belonging to the Yazidi community, who the Islamists view as heretics.

Several women who were able to escape their captors have recounted the horrors they endured.

Three Yazidi women said they were raped 'five times a day' after being traded as human cargo.

The young women - Bushra, 21, Munira, 17, and Noor, 22 – whose names have been changed to protect their identity said they were forced to marry ISIS fighters. The described being tied up, gang raped and burnt with cigarettes.

Bushra tried to kill herself when she was sold to an ISIS extremist. She said: "The man who had bought me took me to hospital. He told me he was going to rape me that same day, however ill I made myself. He took me home, tied up my hands and feet, and raped me.

"He raped me about five times a day. My sister was barely 14 when they raped her... I could hear her screaming but I couldn't do anything as I was tied up."

A UN envoy named Bangura, investigating Islamic State's vile sex trade has said that one woman can be bought by six different men as 'girls get peddled like barrels of petrol'.

Bangura said: "They [ISIS] have a machinery... They have a manual on how you treat these women. They have a marriage bureau which organizes all of these 'marriages' and the sale of women... They have a price list."

She also verified a disturbing ISIS document which suggested the extremists sell the Yazidi and Christian women and children they have abducted.

The price for Yazidi or Christian women between the age of 40 - 50 is $43 (£27)

It then gives the prices of women and children by age, with one to nine-year-olds costing the most - around £110. The older the women, the lower the price.

The pamphlet - published on October 16 - goes on to say: 'Customers are allowed to purchase only three items with the exception of customers from Turkey, Syria and Gulf countries.

Bangura said the fighters get to choose first and then 'wealthy Middle-Easterners are allowed to

The UN envoy has previously said the Yazidi virgins are sent to slave auctions in Islamic State's de facto capital of Raqqa in Syria, where they are stripped naked and sold to the highest bidder.

An ISIS video released in November last year appeared to show an ISIS 'sex slave market' where fighters can choose among different Yazidi girls who are priced according to 'desirable' physical features.

After escaping Iraq, the women were flown to the UK by international charity AMAR, which helps people rebuild their lives following conflict.

Amnesty International has said hundreds, and possibly thousands, have been forced to marry, 'sold' or given as 'gifts' to Islamic State fighters or their supporters - and many held as sexual slaves are girls younger than 14.