The ongoing violence in Iraq killed nearly 4,000 civilians in just six months last year and thousands more are being held as slaves, according to a new report from the United Nations.

The report, a project of the UN Assistance Mission for Iraq and the Office of the High Commissioner for Human Rights, was released Tuesday and shines a light on the extent of the toll that the Islamic State’s presence in Iraq is taking on the nation’s civilian population.

“The violence suffered by civilians in Iraq remains staggering,” the report reads. “The so-called ‘Islamic State of Iraq and the Levant’ (ISIL) continues to commit systematic and widespread violence and abuses of international human rights law and humanitarian law. These acts may, in some instances, amount to war crimes, crimes against humanity, and possibly genocide.”

The report indicates at least 3,855 civilians were killed between May 1 and October 31 of last year, pushing the total number of civilian deaths in the country since the start of 2014 to 18,802.

“Even the obscene casualty figures fail to accurately reflect exactly how terribly civilians are suffering in Iraq. The figures capture those who were killed or maimed by overt violence, but countless others have died from the lack of access to basic food, water or medical care,” UN High Commissioner for Human Rights Zeid Ra’ad Al Hussein said in a statement.

The report indicates at least 7,056 civilians were wounded in Iraq during the six-month window last year. In total, there have been at least 36,245 civilians wounded since the beginning of 2014.

Some 3.2 million people have been displaced within Iraq over the past two years, the UN report found.

The report documents reasons they may be fleeing their homes, including the Islamic State’s gruesome execution techniques.

It cites many reports of public beheadings and several instances in which civilians were thrown from rooftops, as well as one incident in which militants forced nine people to lay down in a Mosul street and then ran them over with a bulldozer in front of a crowd of onlookers.

Some civilians who weren’t killed or injured are being sold into slavery, the report found.

The agencies behind the report wrote they believe the Islamic State currently holds roughly 3,500 people in slavery, many of whom are women the terrorist group is holding as sex slaves.

The Islamic State is also abducting children and training them to become soldiers, according to the report, and captured between 800 and 900 children in one single incident in Mosul.

But Iraqi civilians are facing threats to their safety from other organizations, the UN reported.

The report documents a series of acts allegedly carried out by pro-government forces, including abductions, illegal killings and evictions of people who were trying to escape violence. The acts may represent a violation of international humanitarian law, the UN agencies said in the report.

“This report lays bare the enduring suffering of civilians in Iraq and starkly illustrates what Iraqi refugees are attempting to escape when they flee to Europe and other regions. This is the horror they face in their homelands,” Hussein said in a statement.