The dispute underscores the fragility of the deal as mediators worked to ensure that it would go into effect on schedule.

Israeli Prime Minister Benjamin Netanyahu has accused Hamas of backing out of a cease-fire deal to release hostages and end the war in Gaza, which has raged for more than a year. An Israeli Cabinet vote on the cease-fire deal has been delayed indefinitely.

The deal, mediated by the United States, offered a glimmer of hope in a conflict that has taken an immense human toll.