Deputy chairman of Hamas' political bureau Mussa Abu Marzuk (R) hugs a member of the Ezzedine al-Qassam Brigades, the Islamist movement's armed wing, as he visits relatives of killed senior Hamas commander Mohammed Abu Shamala on August 28, 2014 in Rafah in the southern of Gaza Strip. Shamala, a member of the Ezzedine al-Qassam Brigades, has been killed in the Gaza Strip by the Israeli air force on August 21. Millions in and around the war-torn coastal enclave were enjoying a second day of peace after the guns fell silent following a ceasefire agreement that conditioned the easing of Israel-imposed goods and movement restrictions on the territory. Photo by Abed Rahim Khatib/Flash90

Deputy chairman of Hamas' political bureau Mussa Abu Marzuk (R) hugs a member of the Ezzedine al-Qassam Brigades, the Islamist movement's armed wing, as he visits relatives of killed senior Hamas commander Mohammed Abu Shamala on August 28, 2014 in Rafah in the southern of Gaza Strip. Shamala, a member of the Ezzedine al-Qassam Brigades, has been killed in the Gaza Strip by the Israeli air force on August 21. Millions in and around the war-torn coastal enclave were enjoying a second day of peace after the guns fell silent following a ceasefire agreement that conditioned the easing of Israel-imposed goods and movement restrictions on the territory. Photo by Abed Rahim Khatib/Flash90

Deputy chairman of Hamas' political bureau Mussa Abu Marzuk (C) sits with relatives of killed senior Hamas commander Raed al-Atar on August 28, 2014 during a visit in Rafah in the southern of Gaza Strip. Shamala, a member of the Ezzedine al-Qassam Brigades, has been killed in the Gaza Strip by the Israeli air force on August 21. Millions in and around the war-torn coastal enclave were enjoying a second day of peace after the guns fell silent following a ceasefire agreement that conditioned the easing of Israel-imposed goods and movement restrictions on the territory. Photo by Abed Rahim Khatib/Flash90

Members of the Ezzedine al-Qassam Brigades, Hamas' armed wing, stand guard during a visit by deputy chairman of Hamas' political bureau Mussa Abu Marzuk (unseen) to relatives of killed senior commander Mohammed Abu Shamala on August 28, 2014 in Rafah in the southern of Gaza Strip. Shamala, a member of the Ezzedine al-Qassam Brigades, has been killed in the Gaza Strip by Israeli air force on August 21, 2014. Millions in and around the war-torn coastal enclave were enjoying a second day of peace after the guns fell silent following a ceasefire agreement that conditioned the easing of Israel-imposed goods and movement restrictions on the territory. Photo by Abed Rahim Khatib/Flash90

Members of the Ezzedine al-Qassam Brigades, Hamas' armed wing, stand guard during a visit by deputy chairman of Hamas' political bureau Mussa Abu Marzuk (unseen) to relatives of killed senior commander Mohammed Abu Shamala on August 28, 2014 in Rafah in the southern of Gaza Strip. Shamala, a member of the Ezzedine al-Qassam Brigades, has been killed in the Gaza Strip by Israeli air force on August 21, 2014. Millions in and around the war-torn coastal enclave were enjoying a second day of peace after the guns fell silent following a ceasefire agreement that conditioned the easing of Israel-imposed goods and movement restrictions on the territory. Photo by Abed Rahim Khatib/Flash90

Senior Hamas official Moussa Abu Marzouk arrives to Rafah crossing in the southern Gaza strip after the negotiations in Cairo on August 28, 2014. An open-ended ceasefire in the Gaza war held on Wednesday as Prime Minister Benjamin Netanyahu faced strong criticism in Israel over a costly conflict with Palestinian militants in which no clear victor has emerged. Israel launched an offensive on July 8, with the declared aim of ending rocket fire into its territory. Photo by Abed Rahim Khatib/Flash90

Senior Hamas official, Moussa Abu Marzouk speaks to media in Rafah crossing in the southern Gaza strip after the negotiations in Cairo, on August 28, 2014. An open-ended ceasefire in the Gaza war held on Wednesday as Prime Minister Benjamin Netanyahu faced strong criticism in Israel over a costly conflict with Palestinian militants in which no clear victor has emerged. Israel launched an offensive on July 8, with the declared aim of ending rocket fire into its territory. Photo by Abed Rahim Khatib/Flash90

Senior Hamas official, Moussa Abu Marzouk speaks to media in Rafah crossing in the southern Gaza strip after the negotiations in Cairo, on August 28, 2014. An open-ended ceasefire in the Gaza war held on Wednesday as Prime Minister Benjamin Netanyahu faced strong criticism in Israel over a costly conflict with Palestinian militants in which no clear victor has emerged. Israel launched an offensive on July 8, with the declared aim of ending rocket fire into its territory. Photo by Abed Rahim Khatib/Flash90