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

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

Israel and Hamas have agreed a Gaza ceasefire and hostage deal following meetings with Qatar's prime minister, a source briefed on the talks has told the BBC. There was no confirmation from the Israeli government or Hamas, but a Hamas official earlier told the BBC it had approved a draft from Qatari, US and Egyptian mediators.