The flight of the ethnic Albanian population from Kosovo was executed with a degree of coordination and control that render it impossible to reach any conclusion other than systematic forced expulsion. At least four factors are key in determining that a policy of "ethnic cleansing" was carried out in Kosovo: First is the timing of the refugees' arrival-refugees arrived in Macedonia and Albania from the same areas on the same dates, and at various times (notably during negotiations) the flow of refugees stopped or was switched from one border to another. Second is the means of departure: refugees were expelled into Macedonia by train, which allowed the efficient removal of thousands of persons a day. Others, including many of those sent to Albania who did not have their own transportation, were taken by trucks and buses organized by the Serbian police. Collection points were used to facilitate expulsion. Third is the use of threats and violence to terrorize the population into departing, a central element of "ethnic cleansing," observed frequently during the wars in Bosnia and Croatia. Fourth is the practice of "identity cleansing": refugees expelled toward Albania were frequently stripped of their identity documents and forced to remove the license plates from their cars and tractors before being permitted to cross the border.


http://www.hrw.org/reports/2001/kosovo/undword-03.htm