Families that waited outside a prison for the release of people detained by Israel said the conflict in Gaza and the rising death toll had cast a pall over any celebration.
Hamas freed two dozen hostages, Israel released 39 imprisoned Palestinians, and more than 130 aid trucks reached Gaza over the first day of a tense, temporary truce after seven weeks of war.
The agreement calls for a pause in the fighting and for Hamas to free 50 of the captives it seized in its Oct. 7 raid on Israel. Hamas said Israel would release 150 Palestinians held in Israeli prisons.