A 12-year-old girl was tied up, beaten and raped for by seven ISIS different fighters when she was kidnapped from her home in the Iraq region of Yazidi, a shocking new report has revealed.

The suffering of Jalila - whose name has been changed - is just one of a number of harrowing accounts given by women who have escaped captured by the brutal Islamist organisation which is taking over swathes of territory in Syria and Iraq.

The study undertaken by Human Rights Watch found fighters were kidnapping women and children as young as eight, forcing them to marry and convert to Islam and raping them repeatedly – sometimes picking their victims’ names out of a hand in a sick lottery.

Scroll down for video

Yazidi women and girls have been separated from their families, forced to convert to Islam and repeatedly raped by ISIS fighters, the study from Human Rights Watch says. Their actions amount to war crimes. it adds

Yazidi children as young as eight have been abducted from their homes in northern Iraq, raped by ISIS fighters and forced into marriage. One child interviewed said she was 'owned' and raped by seven different men

Of those who managed to escape, many feel suicidal after their traumatic ordeal and need better medical and psychological support, says Human Rights Watch. Some tried to kill themselves while in captivity to avoid rape

Their terrifying campaign of systematic rape was tantamount to war crimes - and possibly crimes against humanity, the report adds.

Jalila,who managed to escape her tormentors, told the charity she was taken with seven members of her family when Arab men stormed her village north of Sinjar in August 2014.

After a few weeks she was taken to a house in Syria that housed other abducted young Yazidi women and girls, where the men would come and select us.

She was selected by an ISIS fighter, who slapped her and dragged her from the house when she resisted him.

The names of Yazidi women were selected from a lottery for men to rape, a survivor told the charity

‘I told him not to touch me and begged him to let me go’, she said.

‘I was a young girl, and I asked him, ‘What do you want from me?’ He spent three days having sex with me.’

During her captivity seven ISIS fighters ‘owned’ Jalila, and four raped her on multiple occasions.

Human Rights Watch has collected the accounts of 20 women and girls who escaped from ISIS, which they say shows a system of organised rape and sexual assault, sexual slavery and forced marriage – acts that constitute war crimes.

A 12-year-old girl (not pictured) told investigators she was raped for three days by a brutal Islamist militant

Another victim told Human Rights Watch how she had tried to kill herself so that she wouldn't be raped again

Rape and other forms of sexual violence committed during an armed conflict violate the laws of war. These women were part of a group of 216 Yazidis who were recently released by ISIS after being captured last year

ISIS ARE 'COMMITTING GENOCIDE' AGAINST THE YAZIDI MINORITY The survivors' stories come as United Nations (UN) investigators found evidence ISIS are committing genocide against the Yazidi minority in Iraq. The human rights office published a horrifying report in March describing killings, torture, rape, sexual slavery and the use of child soldiers by the extremists. It suggested they may be guilty of 'war crimes, crimes against humanity and genocide'. The report, based on interviews with more than 100 witnesses and survivors between June 2014 and February 2015, highlights brutal ISIS attacks on the Yazidis. The jihadists consistently separated out men and boys over the age of 14 to be executed, according to investigators. Younger boys were forced to become child soldiers and women and girls were abducted as the 'spoils of war'. Head of the investigation Suki Nagra said: 'These attacks were aimed at destroying the Yazidi as a group.' She added that ISIS was guilty of 'genocide' against the minority. Advertisement

Now they are urging that survivors get the medical and psychological treatment that they need to cope with the unimaginable trauma they suffered.

Rashida told the charity she was told by her brother to commit suicide if she was unable to escape the ISIS fighters who had captured her.

‘Later that day they made a lottery of our names and started to choose women by drawing out the names', the 31-year-old said.

‘The man who selected me, Abu Ghufran, forced me to bathe but while I was in the bathroom I tried to kill myself.

‘I had found some poison in the house, and took it with me to the bathroom. I knew it was toxic because of its smell.

‘I distributed it to the rest of the girls and we each mixed some with water in the bathroom and drank it. None of us died but we all got sick.’

Another woman, identified as Dilara, said she was taken to a wedding hall in Syria where ISIS fighters told the group to forget their relatives and prepare to marry them and bear their children.

From 9:30am in the morning, men would come to buy girls to rape them.

She told Human Rights Watch: 'I saw in front of my eyes ISIS soldiers pulling hair, beating girls, and slamming the heads of anyone who resisted.

'They were like animals…. Once they took the girls out, they would rape them and bring them back to exchange for new girls.

The girls’ ages ranged from eight to 30 years… only 20 girls remained in the end.'

Rape and other forms of sexual violence, sexual slavery, cruel treatment, and other abuses committed during an armed conflict violate the laws of war, the report by Human Rights Watch says – and better support is needed for children and women who survive such attacks.

As well as a lack of provision for psycho-social treatment, there is a reluctance in the community to accept it, despite many women continuing to feel suicidal after their ordeal.

'Yazidi women and girls who escaped ISIS still face enormous challenges and continuing trauma from their experience,” Liesl Gerntholtz, the women's rights director at Human Rights Watch said.