to search and destroy smuggling tunnels used by militants to obtain weapons, ammunition, fugitives, cigarettes, car parts, electrical goods, foreign currency, gold, drugs, and cloth from Egypt. Between September 2000 and May 2004, ninety tunnels connecting Egypt and the Gaza Strip were found and destroyed. Raids in Rafah left many families homeless. Israel's official stance is that their houses were captured by militants and were destroyed during battles with IDF forces. Many of these houses are abandoned due to Israeli incursions and later destroyed. According to Human Rights Watch, over 1,500 houses were destroyed to create a large buffer zone in the city, many "in the absence of military necessity", displacing around sixteen thousand people. On 2 February 2004, Israeli Prime Minister Ariel Sharon announced his plan to transfer all the Jewish settlers from the Gaza Strip. The Israeli opposition dismissed his announcement as "media spin", but the Israeli Labour Party said it would support such a move. Sharon's right-wing coalition partners National Religious Party and National Union rejected the plan and vowed to quit the government if it were implemented. Yossi Beilin, peace advocate and architect of the Oslo Accords and the Geneva Accord, also rejected the proposed withdrawal plan. He claimed that withdrawing from the Gaza Strip without a peace agreement would reward terror. Following the declaration of the disengagement plan by Ariel Sharon and as a response to suicide attacks on Erez crossing and Ashdod seaport (10 people were killed), the IDF launched a series of armored raids on the Gaza Strip (mainly Rafah and refugee camps around Gaza), killing about 70 Hamas militants. On 22 March 2004, an Israeli helicopter gunship killed Hamas leader Sheikh Ahmed Yassin, along with his two bodyguards and nine bystanders. On 17 April, after several failed attempts by Hamas to commit suicide bombings and a successful one that killed an Israeli policeman, Yassin's successor, Abdel Aziz al-Rantissi, was killed in an almost identical way, along with a bodyguard and his son Mohammed. The fighting in Gaza Strip escalated severely in May 2004 after several failed attempts to attack Israeli checkpoints such as Erez crossing and Karni crossing. On 2 May, Palestinian militants attacked and shot dead a pregnant woman and her four young daughters. Amnesty International classified it as a crime against humanity and said it "reiterates its call on all Palestinian armed groups to put an immediate end to the