The Palestinian militant group Hamas is expected to hand over three Israelis on Saturday, in the latest stage of a gradual exchange of hostages for Palestinian prisoners under a truce aimed at opening the way to ending the 15-month war in Gaza.

The organization representing families of hostages held in the Gaza Strip is celebrating the news that three male hostages would be released Saturday as part of the cease-fire agreement between Israel and Hamas.

A ceasefire between Israel and Hamas is underway and hostages are being released in stages. But after the initial jubilation of being freed, the released captives — who have been held for more than 15 months — are likely to endure a trying reentry, based on the testimony of those who were held hostage themselves.