Israeli Defense Forces killed five Palestinians, including a baby, at a school sheltering displaced people in Gaza City on Friday, hospital officials said. The attack raised the number of Palestinians killed by Israel to 400 since the October ceasefire began. According to the Palestinian civil defence, Israeli troops fired across the ceasefire line where they had withdrawn to, killing and wounding more people. They said bodies were recovered only after coordination with the UN to avoid further Israeli fire. The Israeli military said soldiers saw "a number of suspicious individuals" and opened fire. The ceasefire line is marked by a yellow line on maps and by yellow concrete markers on the ground. Israeli troops control about 53% of Gaza and often carry out airstrikes on non-occupied areas. Friday’s killings add to violations of the ceasefire, now in its third month. The October ceasefire's first phase stopped fighting, withdrew Israeli troops to the yellow line, and allowed more humanitarian aid into Gaza, which suffered famine due to Israeli restrictions. The second phase aims for permanent peace, requiring Hamas to disarm and hand over power to a civilian authority, plus deployment of an international stabilization force, and Israel's full withdrawal. No agreement exists yet on these points. On Friday, US Secretary of State Marco Rubio said the international force's mandate must be clear before troops commit, noting several nations were willing to participate. Qatar’s Prime Minister Sheikh Mohammed bin Abdulrahman bin Jassim al-Thani warned that delays in phase two "endanger the entire process." The Gaza war began after Hamas militants killed about 1,200 people and took 251 hostage in October 2023. All hostages except one have been returned under the ceasefire deal. Over 70,925 Palestinians have died in the conflict, about half women and children, per Gaza’s health ministry. The death toll may rise as more bodies are found. Much of Gaza’s civilian infrastructure was destroyed by bombing. A UN commission, Amnesty International, and Human Rights Watch accused Israel of genocide — a claim Israel denies.