The arrests of individual groups of Roma began in July 1941, while mass arrests of Roma all over the Independent State of Croatia were put into practice from 20 May 1942 onwards. They were mostly transported in groups to Jasenovac Camp, with their portable possessions. The accompanying documents did not list their names, only the number of people or freight wagons by which they were transported.
In July 1942, when the number of Roma arriving in the camp was at its highest, they were separated into two groups. The older men, women and children were separated from the younger men and immediately sent to be liquidated in Donja Gradina. The younger men were accommodated in Camp III C, set up in the open on the site of Camp III (Brickworks). Many died of hunger, dehydration, exhaustion and physical abuse. Some Roma were housed in the so-called Gypsy Camp in the village of Uštica, in the abandoned houses of murdered Serbian families.
Only a few Roma were assigned to work duties and given the hardest jobs, amongst which was grave-digging in Donja Gradina.
Almost no Roma who entered the camp, regardless of age or gender, survived.