In the Gaza Strip, Israeli attacks have killed at least 18 Palestinians since Wednesday. One assault on a tent encampment for displaced Palestinians killed four people near Al-Aqsa Martyrs Hospital in central Gaza. The strike destroyed dozens of tents and wounded many others, including children. In southern Gaza, medical workers have begun vaccinating tens of thousands of Palestinian children in the city of Khan Younis against polio — the second stage of a U.N.-led polio eradication effort. Meanwhile, Hamas has accused Israeli Prime Minister Benjamin Netanyahu of deliberately undermining efforts to forge a ceasefire and hostage release deal by refusing to withdraw Israeli troops from the Philadelphi Corridor along Gaza’s border with Egypt. This comes as newly published documents show how Netanyahu and Israeli negotiators purposefully prolonged Israel’s assault on Gaza by making new demands during ceasefire talks. The documents published by the Israeli newspaper Yedioth Ahronoth also reveal that three of the six hostages found dead in Gaza last weekend were due for release under a ceasefire agreement drafted in May.