The head of the agency that helps oversee international aid deliveries to the territory has criticized the impact of Israeli policy on civilians.

An Israeli scheme to move hundreds of thousands of already uprooted Palestinians to a so-called "humanitarian city" in Gaza has led politicians to spar with the defence establishment, but officials say a practical plan has yet to be crafted.

All options are on the table if Israel does not deliver on its pledges to facilitate humanitarian aid in Gaza, the European Union's top diplomat said on Tuesday.