The Omarska mines complex was located about from Prijedor. The first detainees were taken to the camp at some point between 26 and 30 May. The camp buildings were almost completely full and some of the detainees had to be held in the area between the two main buildings. That area was lit up by specially installed spot-lights after the detainees arrived. Female detainees were held separately in the administrative building. According to the wartime documents of Serb authorities, there were a total of 3,334 persons held in the camp from 27 May to 16 August 1992; 3,197 were Bosniaks, 125 were Croats.