Gaza health officials said at least 45 Palestinians were killed, including displaced people living in tents who were burnt alive.
Israeli Prime Minister Benjamin Netanyahu has acknowledged there was a “tragic mistake” after an Israeli strike killed dozens of people in the southern Gaza city of Rafah.
In a speech before parliament on Monday, he said Israel was investigating the strike that occurred the night before.
Israel has faced new condemnation for the devastating airstrike that Gaza health officials said killed at least 45 Palestinians, including displaced people living in tents who were burnt alive.
Even some of Israel's closest allies, particularly the United States, have expressed outrage at civilian deaths.
Israel insists it adheres to international law even as it faces scrutiny in the world’s top courts, one of which last week demanded that it halt the offensive in Rafah.