The Palestinian militant group Hamas has released the last surviving hostages it was holding in Gaza, in exchange for almost 2,000 Palestinian detainees and prisoners, under the terms of the Israel-Hamas ceasefire.

One body Hamas returned to Israel as part of the ceasefire deal "does not match any of the hostages," the Israel Defense Forces said on Wednesday.

Some former captives have been sent home from the hospital. But a doctor said they all had “endured untold adversity,” as details emerge of their time in Gaza’s tunnels.

Hamas appeared to tighten its control in Gaza, as the group’s internal security organization urged residents to report "collaborators” with Israel.

The last 20 living hostages released by Hamas are beginning a difficult path to recovery that will include rebuilding a sense of control over their lives and following a carefully supervised diet.

U.S. officials detail plans for rewards to help locate missing hostage bodies in Gaza while addressing Hamas executions and creating safe zones for Palestinians.

Hamas will need more time to recover hostages’ remains still in Gaza, two senior U.S. advisers have said, as Israel’s military began to prepare for the possibility of renewed fighting amid anguish and anger about delays in the return of abductees.

Hamas freed the last 20 living hostages taken in its Oct. 7, 2023, attack earlier this week in exchange for the release of hundreds of Palestinian prisoners.

Hamas still has not returned remains of Itay Chen, Omer Neutra and 17 others, threatening the fragile ceasefire in Israel.