Scores were reported killed in overnight strikes across the Gaza Strip on Sunday, after Hamas said it needed more time to consider a proposal that would halt the war in the besieged Palestinian territory.
Gaza's health ministry said early Sunday that at least 92 people had been killed overnight, including in what the group's media office said was an Israeli bombardment of a kindergarten in Rafah where displaced people were sheltering.
According to Palestinian news agency Wafa, at least two children were killed in the Israeli attack.
Concerns over a potential Israeli ground incursion into the southern border city have mounted in recent days, with hundreds of thousands of displaced seeking refuge from the fighting there in makeshift shelters and encampments.
A representative of the UN humanitarian agency OCHA has called Rafah "a pressure cooker of despair", expressing concern for what might happen next.
Israeli Defence Minister Yoav Gallant warned on Thursday that the military -- which began its ground invasion in the territory's north and has gradually advanced south -- "will also reach Rafah".