Fighting, fuel shortages and Israeli raids put the Gaza Strip's second-largest hospital completely out of service on Sunday, local and UN health officials said, as Israel battled Hamas militants in the devastated Palestinian enclave. The latest blow to Gaza's destroyed healthcare sector came as Israel prepared for an assault of the southernmost city Rafah, home now to more than a million mostly displaced Palestinians - a move that the international community, including Israel's backer the United States, has warned would create enormous human suffering.