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.

Qatar says the ceasefire between Israel and Hamas will go into effect at 0630 GMT on Sunday. This will pause the fighting after 15 months of war and see the release of dozens of hostages held by the militants in the Gaza Strip and hundreds of Palestinians imprisoned by Israel.