DEIR AL-BALAH, Gaza Strip (AP) — Israel says its troops have entered Gaza’s second-largest city as intensified bombardment sends streams of ambulances and cars racing to hospitals with wounded and dead Palestinians. The military says its forces are “in the heart” of Khan Younis, which has emerged as the first target in the expanded ground offensive into southern Gaza. Israel says it aims is to destroy Hamas. Military officials describe the fighting as the most intense since the ground offensive began more than five weeks ago. Heavy firefights are also taking place in northern Gaza. The assault into the south is pushing a new wave of displaced Palestinians and raising alarm from relief groups.