Tangled fighting between the three races broke out ______.

Fighting flared yesterday in northern and southern Bosnia, pitting Serbs against Muslims and Muslims against Croats.(27[C]) Meanwhile, Bosnian Serbs voted on a peace plan they seem certain to reject. The defiance of Bosnian Serbs and the three-way fighting underlined the complexity of bringing peace to this ragged state. A brutal 13-month war had destroyed its elaborate ethnic quiet, stitched together by centuries of coexistence.
   (28[A]) The United States President had dismissed this weekend’s Bosnian Serb referendum as a maneuver to buy time. He is expected to press reluctant Europeans for military action against Bosnia’s Serbs if they do reject the apparently doomed Vance Owen plan.