The Israeli military said Thursday it was looking into whether Hamas’ top leader Yahya Sinwar was killed in a military operation in Gaza. Authorities were conducting DNA tests on a body to determine if it is him, an Israeli security official said. The military said in a statement that three militants were killed during operations in Gaza, without specifying where or elaborating further. It said the identities of the three were so far not confirmed, but it was “checking the possibility” that...