The UN, US and UK have called for more protection for the civilians caught in intense violence between Israel and Palestinian militants.
Footage of children being pulled from the rubble in Gaza and people running for shelter in Israel have sparked international alarm.
The conflict is now in its second week, with little sign of a ceasefire.
More than 212 people, including 61 children, have died in Gaza, and 10, including two children, in Israel.
US President Joe Biden has voiced his support for a ceasefire after eight days of violence between Israel and Palestinian militants in Gaza.
Mr Biden told Israeli Prime Minister Benjamin Netanyahu that the US was working with Egypt and other countries on halting hostilities.
But the US again blocked a UN Security Council statement calling for a cessation of violence.