Israeli authorities said they would stop working Thursday with the main United Nations agency caring for Palestinian refugees, threatening aid deliveries for Gaza that are a key part of the cease-fire deal.

Hamas officials accused Israel on Wednesday of delaying aid deliveries to Gaza and jeopardising a truce and hostage release deal, an allegation Israel dismissed as "fake news."

Trump sent Witkoff to ensure the ceasefire agreement advances to the second phase, which will require hashing out more thorny questions about Gaza’s future.

President Trump’s Middle East envoy is scheduled to meet Prime Minister Benjamin Netanyahu in Israel on Wednesday, according to a spokesman for Mr. Netanyahu. The visit by the envoy, Steven Witkoff, was set to take place as Israeli and Hamas officials prepared for a new round of negotiations aimed at cementing the current cease-fire in Gaza and allowing more exchanges of hostages and Palestinian prisoners.