The United Nations said Friday that a "gross human rights violations" took place in the area, also describing the attack as a possible genocide.
It is no secret that the barbarous practices committed by Daesh often include kidnapping and killing the civilians on the territories controlled by the terrorist group.
"We have received reports that some 16 mass graves containing the bodies of individuals murdered by ISIL [Daesh] have been discovered in Sinjar," Cecile Pouilly, spokeswoman of the Office of the High Commissioner for Human Rights, told reporters.
Pouilly also added that many of the Sunni Arab communities on Iraqi territories recaptured from Daesh undergo similar human rights abuses. Iraqi and Kurdish security forces with their respective affiliated militias have reportedly been carrying out forays, destroying people's belongings. Forced evictions have sometimes taken place, and even extrajudicial killings.
"Sunni Arab communities have faced increasing discrimination, harassment and violence from other ethnic and religious groups who accuse them of supporting ISIL [Daesh]," Pouilly said.
According to the spokeswoman, this has been going on for months, for many Sunnis who were forced to obey the terrorist group are "perceived as having supported" the militants.
"We urge the government of Iraq to investigate all human rights violations and abuses, including those committed against the Arab Sunni communities, to bring the perpetrators to justice and to ensure that victims have access to appropriate remedies," Pouilly said.