With explosions and gunfire echoing in the background and Israeli drones flying overhead, thousands of angry Palestinians gathered in Gaza on Wednesday to bury the dozens of people killed by Israeli mortars that struck outside a United Nations-run school.

Men carried the corpses of children wrapped in white cloth in their arms, while women cried out. Bodies were then laid out on the ground, some wrapped in the green flags of Hamas or the yellow flags of Fatah, the rival Palestinian faction, as people crouched to pray.