Israel Put Restriction On Tents into Gaza? 联合国加沙学校用途查了么？

Can UN confirm that Israel restricted tents to get in Gaza? And does UN have any chance to check whether its schools being used for military purpose? 有报道说因为以色列限制帐篷和移动房屋进入加沙。联合国能否确认这一情况？以色列指称联合国学校被用于哈马斯武装行动，联合国现在有机会进入调查吗？