Thu 25 May 2006 11:52 AM ET (Updates with U.N. statement, details) PRISTINA, Serbia and Montenegro, May 25 (Reuters) - U.N. police in Kosovo fired tear gas to disperse a crowd of ethnic Albanians who stoned a United Nations convoy escorting Serb defence lawyers in the west of the province on Thursday. Three U.N. police officers and one translator were wounded when villagers blocked a road and lobbed stones at vehicles escorting two Serb members of a defence team accredited to the U.N. war crimes tribunal in The Hague, a U.N. statement said. "Police then had to clear the crowd,...