Two months ago, Israel shut all crossings to Gaza – preventing all goods, including food, fuel and medicines from entering - and later resumed its military offensive, ending a two-month ceasefire with Hamas. It said these steps were meant to put pressure on Hamas to release the hostages it still holds.

Sitting inside her fly-infested tent in Gaza City, Iman Rajab sifts clumps of flour through a sieve, over and over again.

No food, fuel, aid or commercial goods have entered Gaza since March 2. Residents say they are surviving on one meal a day or less.