French President Emmanuel Macron voiced outrage on Monday over Israeli strikes on a tented camp for displaced Palestinians in Rafah that Gaza officials said killed at least 45 people and demanded an "immediate ceasefire."

"These operations must stop. There are no safe areas in Rafah for Palestinian civilians," Macron said on X in English.

"I call for full respect for international law and an immediate ceasefire."

The health ministry in Hamas-run Gaza said the death toll had risen to 45 from the overnight Israeli strikes, which sparked fires that burned displaced people alive in their tents, many of them women and children.

Israel's army said it was investigating the reports of civilians killed in the strikes, which have sparked condemnation across the Arab world.