A/RES/50/193 Page 6 obligation to cooperate with the Tribunal, in particular to arrest, detain and facilitate the transfer to the custody of the Tribunal any and all indicted war criminals who reside in or transit through or are otherwise present in their respective territories; 11. Demands that all parties refrain from any action intended to destroy, alter, conceal or damage any evidence of violations of human rights and international humanitarian law and that they preserve such evidence; 12. Expresses its complete support for the victims of violations of human rights and international humanitarian law, recognizes the right of refugees and displaced persons freely to return to their homes of origin in safety and dignity, to have restored to them property of which they were deprived in the course of hostilities since 1991 and to be compensated for any such property that cannot be restored to them, considers null any commitments made under duress, and urges all parties to fulfil their agreements to this end; 13. Condemns all deliberate obstruction of the delivery of food and medical and other supplies essential for the civilian population, which constitutes a serious violation of international humanitarian law and international human rights law, and of medical evacuations, and demands that all parties ensure that all persons under their control cease such acts; 14. Also condemns all attacks on the United Nations Peace Forces and on personnel working with the Office of the United Nations High Commissioner for Refugees and other humanitarian organizations by parties to the conflict; 15. Expresses its outrage that the systematic practice of rape has been used as a weapon of war against women and children and as an instrument of ethnic cleansing, and recognizes that rape in this context constitutes a war crime; 16. Condemns police violence against the non-Serb populations in Kosovo, the Sandjak, Vojvodina and other areas of the Federal Republic of Yugoslavia (Serbia and Montenegro), particularly the systematic acts of harassment, beatings, torture, warrantless searches, arbitrary detention and unfair trials, including those directed mainly against members of the Muslim population; 17. Strongly urges the authorities of the Federal Republic of Yugoslavia (Serbia and Montenegro) to take appropriate measures to respect fully all human rights and fundamental freedoms and to take urgent action to ensure the rule of law in order to prevent arbitrary evictions and dismissals and discrimination against any ethnic or national, religious and linguistic group, including in the fields of education and information; 18. Cautions against any attempts to use Serb refugees to alter the population balance in Kosovo, the Sandjak, Vojvodina and any other part of the country, thus further suppressing the enjoyment of human rights in those areas; 19. Strongly encourages all parties to fulfil the commitments made at Dayton, Ohio, to release without delay all civilians and combatants held in prison or detention in relation to the conflict, in conformity with international humanitarian law and the provisions of the General Framework /...