Israel and Hamas have agreed to a pause in their two-year war and the release of the remaining hostages in exchange for Palestinian prisoners.
The truce, now in its fourth day, is supposed to bring calm to war-battered Gaza for at least six weeks.
At least 39 people were killed by Israeli strikes across northern Gaza on Saturday.
Israeli forces shelled tent camps for displaced Palestinians north of Gaza's southern city of Rafah on Friday, killing at least 25 people and wounding another 50.
The Israeli military on Sunday announced a “tactical pause” in its offensive in the southern Gaza Strip to allow the deliveries of increased quantities of humanitarian aid.
Israel’s prime minister faced growing pressure Saturday after U.S. President Joe Biden announced a proposed agreement to end the fighting in Gaza.
The White House condemned the loss of life of dozens of civilians as a result of an Israeli airstrike in Rafah, but said it is not planning any policy changes as a result of the Israeli actions.
Palestinian health officials say at least 45 people, around half of them women and children, were killed in Sunday’s strike.
Israel's military had earlier said that it launched an investigation into civilian deaths after it struck a Hamas installation.
Palestinian health workers said Israeli airstrikes killed at least 35 people Sunday and hit tents for displaced people in the southern Gaza city of Rafah.