The cease-fire between Hamas and Israel will go into effect at 8:30 a.m. local time, mediator Qatar announced Saturday, as families of hostages held in Gaza braced for news of loved ones, Palestinians prepared to receive freed detainees and humanitarian groups rushed to set up a surge of aid.

Israeli Prime Minister Benjamin Netanyahu 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.

Secretary of State Antony Blinken had said the U.S. wanted a ceasefire deal in Gaza and all remaining captives released before Donald Trump takes office on Jan. 20.