The Israeli military had targeted other Al Jazeera correspondents before Mr. al-Sharif, claiming they were members of Hamas’s military wing — accusations that the network and its journalists denied. Last summer, it killed Ismail al-Ghoul in an airstrike that also took the life of another reporter. In March, an Israeli strike killed another Al Jazeera journalist, Hussam Shabat. The strike on Mr. al-Sharif came after Israel’s security cabinet on Friday voted to intensify its military operations in the area and to take over Gaza City. Al Jazeera called the strike “a desperate attempt to silence the voices exposing the impending seizure and occupation of Gaza.” Mourners buried the journalists on Monday. The United Nations human rights office condemned the killing as a grave breach of international law, adding that at least 242 Palestinian journalists had been killed in Gaza since the war began. Despite the rising tensions, Qatar is expected to continue mediating Israel-Hamas talks. Mr. Guzansky said that being a mediator serves Qatar’s interests by highlighting the tiny country’s importance to international allies, chief among them the United States.