ISIS fighters have told families in Iraq to hand over their daughters for sex, saying that the women must sleep with militants in order to cleanse themselves.

According to the Mirror, leaflets in the captured cities of Mosul and Tikrit claim the women - virgins or not - must join jihad, or Holy war, and cleanse themselves by sleeping with militants.

Last year, a Saudi-based cleric issued a fatwa allowing jihadists to rape women in Syria.

The practice is now happening in Iraq.

It is claimed that the militants have warned that those who refused to abide by the fatwa were violating God's will, and would be beaten and killed.

Meanwhile, ISIS fighters yesterday seized key towns near Baghdad and took control of three out of four border crossings to Syria this weekend, the report said.