On 11 September the UN agency for refugees (UNRWA) reported that six of its employees had been killed in an Israeli airstrike on al-Jaouni school in central Gaza, which was sheltering thousands of displaced Palestinians. Altogether, eighteen were killed in the attack. Israel's military stated that the strike targeted terrorists planning attacks from the school, adding that measures were taken to avoid civilian casualties. The UN condemned the attack as a violation of international humanitarian law. The incident marks the fifth strike on the school in eleven months and the highest death toll among UN staff in the current conflict. Israel defended the airstrike, asserting that Hamas uses civilian buildings for military operations - a claim which Hamas denies. Meanwhile, there is evidence that Israel has been laying tarmac on a crucial border road: see