The Israeli Defense Forces said it was checking unconfirmed reports on October 17 that Yahya Sinwar, the leader of Iran-backed Hamas, which has been designated a terrorist organization by the United States and European Union, was killed during military "operations" in the Gaza Strip.
Realistically, Israel could permit third party journalists and investigators back into the conflict zone.
Letting anyone inside a war zone is a very bad idea. This is why war zones called war zones. Anyone inside a war zone is in an official life danger.