Israeli forces expanded their military operations in the southern Gaza city of Khan Younis, intensifying efforts to kill Hamas’s top leadership, as aid agencies said the areas to which Israel has directed Palestinians to evacuate were increasingly overcrowded, short on resources and hit by Israeli strikes.

A Hamas political delegation was headed to Cairo on Friday to discuss a deal proposed by Egypt to end the war, a plan that neither side has agreed to so far, Egyptian officials said. Israel said negotiations on the deal, which would free hostages held by Hamas, were under way.