Sharif, a well-known correspondent, was among those killed. Israel said it had targeted Mr. al-Sharif, claiming he worked for Hamas, which he had denied.

Sharif, 28, drew millions of followers on social media and emerged as one of the top voices in the Arab world for his chronicling of the war in Gaza.

Local health officials in Gaza say that Israeli forces have killed at least 40 people overnight, including a well-known journalist who Israel said was a militant as well as people who witnesses say were seeking humanitarian aid.