Fighting has intensified in Gaza as the Israeli army continues to push into the city of Khan Younis, where tens of thousands of displaced people have been sheltering.

In one of his strongest moves yet, the UN Secretary General Antonio Guterres has invoked Article 99 of the UN Charter to push the Security Council to call for a humanitarian ceasefire - stressing the war is causing a catastrophe that Gaza may never recover from.

Save the Children's Country Director Jason Lee spoke to Charlotte Cook.