 The response of the NDH authorities to resistance had been to burn down the villages where this had occurred , and there were mass shootings of Serbs , which escalated the level of violence even further . In late May and June , 173 Serbs had been rounded up , tortured and killed in Nevesinje , and in early June , another 140 Serbs had been killed at Ljubinje . In response , Serbs attacked Ustaše officials and facilities , and conducted raids themselves , killing Muslim villagers . 
 The response of the NDH authorities to resistance had been to burn down the villages where this <a href='been_done' title='1'><mark>had</mark></a> occurred , and <a href='dey_it' title='2'><mark>there</mark></a> <a href='uninflect' title='3'><mark>were</mark></a> mass shootings of Serbs , which escalated the level of violence even further . In late May and June , 173 Serbs <a href='been_done' title='4'><mark>had</mark></a> been rounded up , tortured and killed in Nevesinje , and in early June , another 140 Serbs <a href='been_done' title='5'><mark>had</mark></a> been killed at Ljubinje . In response , Serbs attacked Ustaše officials and facilities , and conducted raids themselves , killing Muslim villagers . 
The response of the NDH authorities to resistance had been to burn down da villages where dis done occurred , and it was mass shootings of Serbs , which escalated tdalevel of violence even further . In late May and June , 173 Serbs done been rounded up , tortured and killed in Nevesinje , and in early June , anotha 140 Serbs done been killed at Ljubinje . In response , Serbs attacked Ustaše officials and facilities , and conducted raids theyself , killin Muslim villagers .