There is no detailed plan in place to govern Gaza after the war, much less rebuild it. Any return of Hamas will test the patience of Israel, which has said it will resume fighting unless the group is dismantled.

CAIRO — The cease-fire between Hamas and Israel will go into effect Sunday 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 ceasefire between Hamas and Israel will go into effect Sunday at 8:30 a.m. local time, mediator Qatar announced Saturday.