Untreated diseases could eventually kill more people in Gaza than bombings if the health system is not restored, the World Health Organization says.

Axar.az reports that diarrhoea and respiratory infections are widespread among children in overcrowded UN facilities where almost 1.1 million people are sheltering.

Patients with chronic illnesses like cancer are also receiving no treatment.

The warning comes as a truce between Israel and Hamas entered a fifth day, after a 48-hour extension was agreed.

The deal mediated by Qatar, Egypt and the United States should see an additional 20 Israeli women and children held hostage in Gaza being released in exchange for 60 Palestinian women and teenagers in Israeli prisons.