Children injured in Israeli bombardment, await treatment at the Al Najjar Hospital in Rafah on Friday. AFP

"The system in Gaza is on its knees, it's more than on its knees," WHO spokesperson Christian Lindmeier told reporters in Geneva. "All the lifelines in Gaza have more or less been cut."

Lindmeier said this had created a "desperate situation," as seen on Thursday, when more than 100 people seeking humanitarian aid in Gaza were killed.

Gaza health authorities said Israeli forces shot dead the Palestinians as they waited for an aid delivery. Israel blamed the deaths on crowds that surrounded the aid trucks, saying victims had been trampled or run over.

"People are so desperate for food, for fresh water, for any supplies that they risk their lives in getting any food, any supplies to support their children, to support themselves," Lindmeier said.

While aid is reaching southern parts of the Gaza Strip, it is too slow to avert a hunger crisis even there. Aid barely makes it to northern areas that are further from the main border crossing and only accessible through more active battle fronts. "The food supplies have been cut off deliberately. Let's not forget that," Lindmeier said.

Reuters