Water purifiers, medical supplies and tent poles are among items Israel has blocked from entering the Gaza Strip on aid trucks, according to an Egyptian Red Crescent document seen by Reuters and sources in Gaza, but Israel denied blocking any such items.

Under a policy that long predates the Oct. 7 Hamas attack on Israel and ensuing war in Gaza, Israel inspects trucks bound for the Palestinian enclave to stop any items it considers to have potential "dual use" — civilian or military.

But the issue of which items do or don't get through has become more urgent and contested as the war unfolded. The conflict has displaced most of Gaza's population and caused acute shortages of food, water, medicines and other basic necessities.