Analysis of information sources in references of the Wikipedia article "Chetnik war crimes in World War II" in English language version.
Ustashe (Ustaše, the plural of Ustaša) rounded up Serbs, Jews, Roma, and others, interned them in concentration camps, and carried out numerous massacres, sometimes with the support of local Muslims.. Chetniks conducted massacres of Croat and Muslim civilians in retaliation for the Ustasha atrocities.