A spokesman for the United Nations in Kosovo says international judges and prosecutors have started working in the country's ethnically divided north. The spokesman says the justice workers moved into a U.N.-run courthouse Friday in the northern part of Mitrovica for the first time since violent clashes forced them to evacuate more than six months ago. In March U.N. police stormed the courthouse to pull out Serb protesters who had occupied it for three days to protest Kosovo's independence declared on Feb 17. Serb demonstrators traded gunfire with international peacekeepers and attacked them with rocks, grenades and Molotov cocktails, Associated Press reported.