EL AUJA BORDER CROSSING, Egypt  France sent technical equipment to help Gazans draw water from the ground. The Swiss sent blankets and plastic tarps. Mercy Corps, a relief agency, sent 12 truckloads of food. And on Tuesday all of it, including dozens of other trucks carrying sugar, rice, flour, juice and baby formula, sat in the hot sun here going nowhere.

This normally quiet commercial crossing between Egypt and Israel has been turned into a parking lot of stalled, humanitarian aid, and in the city of El Arish there are even greater quantities of food, clothing and essential supplies, sitting, waiting and baking in the sun. Some supplies are loaded onto dozens of trucks parked on city streets, but much more is stored in the open areas of a local sports stadium, also waiting, also going nowhere. Only medical supplies seem to be getting through to Gaza.

Since the cease-fire, Israel has allowed some humanitarian supplies into Gaza, but the territory is still desperately short of the necessities. Israel closed all the crossings into Gaza on Tuesday after an Israeli soldier was killed in a bombing on the Israeli side of the border. But that changed nothing at this crossing, where the flow has been stalled for days.

Officials and volunteers in Egypt blame the Israelis, saying that even before the passage stalled Israel had allowed supplies to pass through for only 19 hours each week. Israeli officials said that Egypt had not done enough to coordinate the flood of aid coming to Gaza, and that they hoped a system would soon be in place to remedy the problem.