PARIS (AP) — An international human rights group says foreign fighters, including many Europeans, were responsible for carrying out the Islamic State group's atrocities against minority Yazidis.

The Paris-based International Federation for Human Rights says the extremist group's actions amounted to genocide and crimes against humanity.

Nadia Murad, a Yazidi who escaped the Islamic State and a co-recipient of this year's Nobel Peace Prize, echoed the findings of Thursday's report.

More than half of Yazidis taken captive are still missing. Women and girls who escaped described an organized system of slavery overseen by high-ranking foreign fighters

Islamic State members in general face terrorism charges in Iraq. The rights group wants them tried before an international tribunal or brought home to face charges, and for Yazidis to have a role in the reckoning.