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

The deal will take place in three different phases, each of which will last for six weeks, according to U.S. and Qatari officials.

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.