The Omarska camp was a concentration camp run by the Army of Republika Srpska in the mining town of Omarska, near Prijedor in northern Bosnia and Herzegovina, set up for Bosniak and Bosnian Croat prisoners during the Prijedor ethnic cleansing. Functioning in the first months of the Bosnian War in 1992, it was one of 677 alleged detention centers and camps set up throughout Bosnia and Herzegovina during the war. While nominally an "investigation center" or "assembly point" for members of the Bosniak and Croatian population, Human Rights Watch classified Omarska as a concentration camp.

Internment is the imprisonment of people, commonly in large groups, without charges or intent to file charges. The term is especially used for the confinement "of enemy citizens in wartime or of terrorism suspects". Thus, while it can simply mean imprisonment, it tends to refer to preventive confinement rather than confinement after having been convicted of some crime. Use of these terms is subject to debate and political sensitivities. The word internment is also occasionally used to describe a neutral country's practice of detaining belligerent armed forces and equipment on its territory during times of war, under the Hague Convention of 1907.