against civilian targets since 1967. Many Jewish neighborhoods have been fired upon from Arab areas. The proximity of the Arab areas, if these regions were to fall in the boundaries of a Palestinian state, would be so close as to threaten the safety of Jewish residents. Holy sites Israel has concerns regarding the welfare of Jewish holy places under possible Palestinian control. When Jerusalem was under Jordanian control, no Jews were allowed to visit the Western Wall or other Jewish holy places, and the Jewish cemetery on the Mount of Olives was desecrated. Since 1975, Israel has banned Muslims from worshiping at Joseph's Tomb, a shrine considered sacred by both Jews and Muslims. Settlers established a yeshiva, installed a Torah scroll and covered the mihrab. During the Second Intifada the site was looted and burned. Israeli security agencies routinely monitor and arrest Jewish extremists that plan attacks, though many serious incidents have still occurred. Israel has allowed almost complete autonomy to the Muslim trust (Waqf) over the Temple Mount. Palestinians have voiced concerns regarding the welfare of Christian and Muslim holy places under Israeli control. Additionally, some Palestinian advocates have made statements alleging that the Western Wall Tunnel was re-opened with the intent of causing the mosque's collapse. Palestinian refugees Palestinian refugees are people who lost both their homes and means of livelihood as a result of the 1948 Arab–Israeli conflict and the 1967 Six-Day War. The number of Palestinians who fled or were expelled from Israel following its creation was estimated at 711,000 in 1949. Descendants of these original Palestinian Refugees are also eligible for registration and services provided by the United Nations Relief and Works Agency for Palestine Refugees in the Near East (UNRWA), and as of 2010 number 4.7 million people. Between 350,000 and 400,000 Palestinians were displaced during the 1967 Arab–Israeli war. A third of the refugees live in recognized refugee camps in Jordan, Lebanon, Syria, the West Bank and the Gaza Strip. The remainder live in and around the cities and towns of these host countries. Most of these people were born outside Israel, but are descendants of original Palestinian refugees. Palestinian negotiators, such as Yasser Arafat, have so far publicly insisted that refugees have a right to return to the places where they lived before 1948 and 1967, including those within the 1949 Armistice lines, citing the Universal Declaration of Human Rights and UN