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.
The conflict is now in its second week, with little sign of ending.
Israel conducted further air strikes on Gaza early on Tuesday. Its army said dozens of rockets were fired into its territory overnight.
The Israel-Palestinian conflict explained
The claims fact-checked
At least 212 people, including 61 children, have now died in Gaza, and 10, including two children, in Israel.
Israel says most of those killed in Gaza are militants and that any civilian deaths are unintentional.
But Hamas, the militant group that runs the territory, disputes this.
According to a White House statement on Monday, Mr Biden “encouraged Israel to make every effort to ensure the protection of innocent civilians”.
“The two leaders discussed progress in Israel’s military operations against Hamas and other terrorist groups in Gaza,” it added.