Following an assassination attempt on Israeli ambassador Shlomo Argov in London the IDF started an invasion of Lebanon on 6 June 1982, which heavily afflicted Tyre once again: Shelling by Israeli artillery and air raids killed some 80 people on the first day across the city. The Palestinian camps were bearing the brunt of the assault, as many guerillas fought till the end. Though El Buss was less affected than other camps, a contemporary United Nations report found that half of the houses in the camp were either badly damaged or destroyed during the invasion. The Advisory Committee on Human Rights of the American Friends Service Committee termed the destruction of homes in El-Buss "systematic". As a consequence, the drive to emigrate from El-Buss increased further:""Some of the refugees, in particular those who were injured or whose dwellings were completely destroyed, sought to leave Lebanon indefinitely. Connection between internal migration and international migration was effected at that time. Denmark and Sweden agreed to accept these refugees. Germany too continued to receive some of them. The migratory field thus extended to new countries further north, whilst Germany, the previous principal recipient country, now became primarily a country of transit towards Scandinavia"."In 1984, the United Nations Educational, Scientific and Cultural Organisation (UNESCO) declared Tyre, including el Buss, a World Heritage Site in an attempt to halt the damage being done to the archaeological sites by the armed conflict and by anarchic urban development.