Iraqi forces backed by a U.S.-led coalition have advanced against ISIS on a number of fronts in recent months. But the extremists have meanwhile carried out a number of large-scale bombings targeting civilians in Baghdad and elsewhere

The United Nations says violence killed at least 1,119 Iraqis in March, a sharp increase from the previous month, as ISIS stepped up attacks on civilians despite suffering battlefield setbacks.

Another 1,561 Iraqis were wounded last month, the U.N. mission to Iraq said in a statement Friday. The figures include 575 civilians killed and another 1,196 wounded. The other casualties were Iraqi security forces, including Kurdish forces known as the peshmerga and government-allied militiamen.

The worst-hit area was the capital, Baghdad, with 259 civilians killed and 770 wounded, followed by the northern Ninevah province, which is almost entirely controlled by IS, with 133 killed and 89 wounded.

The U.N. said it could not verify reports of large numbers of casualties from secondary effects of violence, including those who died after fleeing their homes from exposure to the elements or lack of food, water or health care.

The U.N. envoy to Iraq, Jan Kubis, said he’s “extremely disturbed at the continuing loss of life and injury as a result of terrorism, violence and armed conflict.”

“It is totally unacceptable that civilians should bear the brunt of violence,” Kubis said in the statement.

The ISIS group seized much of northern and western in Iraq in the summer of 2014 and established a self-styled Islamic caliphate in the areas of Iraq and Syria under its control, imposing a violent version of Islamic law.

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