But local police , controlled by nationalist parties in Moslem , Serb and Croat sectors of Bosnia , and civilian mobs have turned ceasefire lines into virtually impassable borders .
<response> But local police , controlled by nationalist parties in <misc>Moslem</misc> , <misc>Serb</misc> and <misc>Croat</misc> sectors of <location>Bosnia</location> , and civilian mobs have turned ceasefire lines into virtually impassable borders . </response>