Estimates of the number of Serbs who left when Serbian forces left Kosovo vary from 65,000 to 250,000. Within post-conflict Kosovo Albanian society, calls for retaliation for previous violence done by Serb forces during the war circulated through public culture. Widespread attacks against Serbian cultural sites commenced following the conflict and the return of hundreds of thousands of Kosovo Albanian refugees to their homes. In 2004, prolonged negotiations over Kosovo's future status, sociopolitical problems and nationalist sentiments resulted in the Kosovo unrest. 11 Albanians and 16 Serbs were killed, 900 people (including peacekeepers) were injured, and several houses, public buildings and churches were damaged or destroyed.