Relatives found the body on Saturday of a 6-year-old Palestinian girl who had begged Gaza rescuers to send help after being trapped by Israeli military fire.
Saudi Arabia said on Saturday that Israel's planned army operation in overcrowded Rafah would cause a "humanitarian catastrophe" and called for the United Nations Security Council to intervene.
Gaza's Hamas-run health ministry on Sunday said the death toll in the war-torn Palestinian territory breached 25,000 as Israel pushed its southward offensive and renewed bombardment in the north.
Israel negotiated a deal with Qatar to get medicines through to hostages still being held in the Gaza Strip, the Israeli prime minister's office said on Friday.
Bombed-out neighbourhoods, mass graves dug in the sand, spreading hunger and disease as the bloodiest ever Gaza war nears 100 days, besieged Palestinians have endured ever new horrors.