More than 1,000 Iraqis—most of them civilians—were killed by political and sectarian violence in Iraq during July, marking the deadliest month in this country since 2008, the U.N. Assistance Mission in Iraq announced on Thursday.

The spike in violence follows the so-called US withdrawal after a decade of war and occupation in Iraq—marked by staggering civilian death rates, high-profile atrocities, and decimation of social infrastructure.

1,057 Iraqis were killed and 2,326 injured by deadly waves of bombings and shootings, with Baghdad the hardest hit, according to the UNAMI report.