Gaza City and its surrounding area is now experiencing famine, a UN-backed body of food security experts has confirmed.

The Integrated Food Security Phase Classification (IPC), which is used by governments and international bodies to identify hunger levels around the world, has raised its classification to Phase 5 - the highest and most severe.

It says that over half a million people across the Gaza Strip are facing "catastrophic" conditions characterised by "starvation, destitution and death".

Israel said the IPC report was based on "Hamas lies". It continues to restrict the amount of aid entering Gaza and has previously denied there is starvation in the territory.

This denial is in direct contradiction to what more than 100 humanitarian groups, witnesses on the ground, and multiple UN bodies have said.

The IPC report describes the famine as "entirely man-made" and says that an "immediate, at-scale response" is needed or there will be an "unacceptable escalation" in famine-related deaths.

It predicts that between mid-August and the end of September, famine will expand across the strip to Deir al-Balah and Khan Younis.

UN chief António Guterres says the crisis is "a man-made disaster" as he called for unrestricted humanitarian access to Gaza.

It comes as Israeli Prime Minister Benjamin Netanyahu says his cabinet has approved plans for a new assault on Gaza City.

The IDF says it has told doctors and aid workers to start making evacuation arrangements ahead of its expanded offensive.