The hunger and desperations is happening “despite all the warnings we gave about this tragedy”, the chief of the UN’s refugee agency tells Al Jazeera, describing the state of Palestinian children inside UNRWA-run shelters and schools.

“Whenever you go to a school, the kids are looking at your eyes begging for a sip of water of a loaf of bread,” said Philippe Lazzarini.

“This 100 days feels to be an eternity. But despite all the adversity, I find our staff very motivated, heroic and committed to provide assistance,” he added, asking for more aid trucks to be allowed into the besieged Gaza Strip.