The girls had been ordered to accept temporary marriages to the terrorists and were murdered, sometimes alongside their families, for their refusal to be sex slaves in Iraq's second largest city of Mosul.
ISIS began selecting women of Mosul and forced them into marrying its militants, calling it temporary marriage since it has taken control over Mosul, and the women who refused to submit to this practice would be executed, said Kurdish Democratic Party spokesman Said Mamuzini.
Another official from the Patriotic Union of Kurdistan (PUK) party Ghayas Surchi said that human rights were being widely violated in all IS-held territories, particularly the womens' rights as they're seen as commodities and have no choice in choosing their spouses.
Surchi said that women were not allowed to go out alone in Mosul and cannot choose their spouses.
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Up to 500 Yazidi women and girls were kidnapped and sexually abused by militants in August 2014.
In October, more than 500 Yazidi women and young girls were reportedly abducted by the ISIS when they stormed the Sinjar region in northern Iraq.
ISIS took control of Mosul in June 2014 after the fall of Iraqi army in the city and since then has been slaughtering its residents for various charges to spread fear.
"My expectation is that by the end of the year, we will have created the conditions whereby Mosul will eventually fall," Obama had said.