The number of acutely malnourished children has increased by 34% compared with last year, a United Nations report says.
Hamas says it supports UN request to halt the fighting to allow a vaccination campaign for children against polio.
The Yemeni group seizes UN Human Rights Office in the capital Sanaa as it extends a crackdown on foreign organisations.
UN Secretary-General Antonio Guterres urges reform, says the African continent is underrepresented in a changing world.