WASHINGTON — A last-minute glitch surfaced on Thursday in the details of the Gaza ceasefire-for-hostages deal and U.S. envoys are working to resolve it, according to a U.S. official cited anonymously by Reuters.

Working on the issue is President Joe Biden's Middle East envoy, Brett McGurk, and President-elect Donald Trump's envoy, Steve Witkoff. They are both in Doha with Qatari and Egyptian negotiators, the official said.

The dispute was over the identities of several prisoners that Hamas is demanding to be released, the official said, adding that the issue is expected to be resolved soon. The disagreements also include how Israeli forces would deploy along Gaza’s border with Egypt during the truce, Omer Dostri, the prime minister’s spokesperson has said, cited by the New York Times.

"We’re aware of these issues and we are working through them with the Israeli government, as well as other partners in the region," White House national security spokesperson John Kirby also said. "We are confident these implementing details can be hammered out and that the deal will move forward this weekend."

The prime minister of Qatar announced yesterday that the cease-fire is set to begin on Sunday, Jan. 19. The Israeli cabinet was expected to convene on Thursday to review and officially approve the cease-fire deal, but Israeli Prime Minister Benjamin Netanyahu's office said cabinet would not meet until the disputes in Doha were resolved, which could push back the truce's implementation.

Haaretz reported early Thursday evening that no progress had been made in the day's ongoing negotiations in Qatar, citing sources familiar with the mediation, who, echoing sources cited in other media, added that they believed the disputes were not insurmountable and a resolution is still likely to be reached.

Netanyahu's office released a statement saying Hamas is challenging Israel's veto on the release of a certain number of prisoners classified as mass murderers and seen as "symbols of terror." Hamas officials did not respond when presented, by New York Times reporters, with these claims and the claim that the Egyptian border is also an ongoing point on contention, however, earlier on Thursday, a senior Hamas official said the group was still committed to the agreement.