The UN is accusing Israel of showing a "flagrant disregard for the lives of civilians" after it bombed a Gaza school where thousands were sheltering, killing at least six people.
It says no place is safe in the crowded Strip - which is rapidly running out of food, water, fuel and medical supplies to treat its 12 thousand wounded.
Four days ago Israel told Gazans to move south for their own safety. But today it bombed just outside the cities of Khan Younis and Rafah, where hundreds of thousands have taken shelter - killing dozens of people.
You may find some of this report distressing.