A large-scale Israeli operation in northern Gaza killed dozens of people and threatened to shut down three hospitals, Palestinian officials and residents said Wednesday. Thousands of people were trapped in the area, particularly in the Jabaliya refugee camp, as UN officials warned of shortages of basic supplies. The Gaza war death toll on Wednesday rose to more than 42,000, according to health officials in the blockaded Palestinian enclave. Follow our liveblog for the latest developments on the crisis in the Middle East.