They said they were ready to force their way back across post-war ethnic lines to Serb-held Doboj , one of several towns where NATO troops fear violence involving refugees determined to vote where they once lived .
<response> They said they were ready to force their way back across post-war ethnic lines to <misc>Serb-held</misc> <location>Doboj</location> , one of several towns where <organization>NATO</organization> troops fear violence involving refugees determined to vote where they once lived . </response>