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.

The United States, Egypt and Qatar have spent the past year trying to mediate an end the 15-month war and secure the release dozens of hostages.

Mediator Qatar says the ceasefire between Hamas and Israel will go into effect Sunday morning. But Israeli Prime Minister Benjamin Netanyahu is warning that a ceasefire won't go forward unless