 The NDH authorities in Trebinje heard rumours that the Serbs could start an uprising there on 28 June , the feast day of Saint Vitus , and warned NDH forces in the region to be prepared for a revolt . As a result of these reports , the Poglavnik ( leader ) of the NDH , Ante Pavelić , issued orders threatening that anyone who spread these rumours would be court @-@ martialled . On the eve of the feast day , both the gendarmerie and Ustaše took several hostages in case the rumours were true . Later , the gendarmerie released their hostages , but the 19 hostages held by the Ustaše were killed . In contrast to the actions of the Ustaše , the Home Guard units in the area tried to calm the situation down . 
 The NDH authorities in Trebinje heard rumours that the Serbs could start an uprising there on 28 June , the feast day of Saint Vitus , and warned NDH forces in the region to be prepared for a revolt . As a result of these reports , the Poglavnik ( leader ) of the NDH , Ante Pavelić , issued orders threatening that anyone <a href='null_relcl' title='1'><mark>who</mark></a>spread these rumours would be court @-@ martialled . On the eve of the feast day , both the gendarmerie and Ustaše took several hostages in case the rumours <a href='uninflect' title='2'><mark>were</mark></a> true . Later , the gendarmerie released their hostages , but the 19 hostages held by the Ustaše <a href='uninflect' title='3'><mark>were</mark></a> killed . In contrast to the actions of the Ustaše , the Home Guard units in the area tried to calm the situation down . 
The NDH authorities in Trebinje heard rumours dat da Serbs could start an uprising dere on 28 June , the feast day of Saint Vitus , and warned NDH forces in tdaregion to be prepared for a revolt . As a result of these reports , the Poglavnik ( leader ) of the NDH , Ante Pavelić , issued orders threatening that anybody spread dem rumours would be court @-@ martialled . On thdave of thedaast day , both the dadarmerie and Ustaše took several hostages in case the rdaurs was true . Later , the gedarmerie released their hostages , but the 19 hostages held by the Ustaše was killed . In contrast to the actdas of the Ustada, the Home Guard units in the area tried to calm the situadan dwn .