Israel-Hamas War Conflict News Highlights: The estimated number of Hamas-held captives killed in Gaza due to Israeli strikes is around 50, Abu Obeida, a spokesman for the al-Qassam Brigades, Hamas's armed wing, said on Thursday. This comes after Israeli ground forces carried out a relatively large incursion into the Gaza Strip overnight to attack Hamas positions. Meanwhile, as the death toll from Israeli airstrikes mounted in Gaza, Palestinians are burying the unidentified dead in mass graves, with a number instead of a name, said a media report. The United Nations Agency for Palestinian Refugees warned yesterday that without immediate deliveries of fuel, it would have to sharply cut back relief operations across the Gaza Strip. What is the death toll? The war is the deadliest of five Gaza wars for both sides, with Israeli airstrikes and raids killing at least 6,500 Palestinians. More than 1,400 people in Israel were killed by Hamas and over 220 are being held hostage. Four female hostages were released this week by the Hamas, with one of the hostages describing how she was taken into tunnels as a captive.