text:  The Israeli military said on Tuesday also that Hamas militants were operating in this school. This isn't the first time the military has struck a school that was sheltering displaced Palestinians. The UN Agency for Palestinian Affairs, also known as UNRWA, used to run these schools and have said that nowhere is safe now in Gaza, that 70% of their schools have been hit. They said about 540 Palestinians sheltering in these facilities have now been killed, many of whom are