There are no longer any functional hospitals in the north of the Gaza Strip, the World Health Organization said Thursday, describing "unbearable" scenes of largely abandoned patients begging for food and water.

The U.N. health agency said it had led missions to two badly damaged hospitals, Shifa and Al-Ahli, in the north of the Palestinian territory on Wednesday.

"Our staff are running out of words to describe the beyond catastrophic situation facing remaining patients and health workers," said Richard Peeperkorn, the WHO representative for the occupied Palestinian territory.