A dispute over aid flows to the north of the Israeli-besieged enclave temporarily held up a deal to free captives on Saturday.
The deliveries were made to hospitals where rations were controlled, Elder said.
"It seems callous and cold to think that we may be getting to the end of those deliveries and hostilities will continue, (that) the war, this war on children will continue."
Even as the aid deliveries flowed north, Elder said he saw hundreds of Gazans heading in the other direction, fearing the renewal of Israeli bombardments if the four-day truce is not prolonged.
I saw grandmothers carrying children, children pushing grandmothers in wheelchairs through the dust," he said.
Persons:
gaunt, children's agency's James Elder, UNICEF's Elder, Elder, Emma Farge, Giles Elgood
Organizations:
Palestine Red Crescent Society, Hamas, UNICEF, GENEVA, UN, Cross, Thomson
Locations:
Palestine, Gaza, Israel, Palestinian, Gaza City