I've killed everyone that I can find in this area, have freed everyone in the large (west) cage, but when I try to open the east (indoor) cage, Kurisu asks "is it safe yet?", and my only dialog option is "no, let me finish here". But I can't find anyone else alive in the area. I've been behind the buildings, inside all the rooms, there's nobody here but me, Sulik, and the prisoners in that cage. Is this a bug? or is there something I have to do *other* than slaughter the slavers?