Saturday's exchange marks the final swap of living hostages under the first phase of the Israel-Hamas ceasefire agreement. Joining us from Washington, Aaron David Miller, Senior Fellow at the Carnegie Endowment for International Peace,

Hamas is set to free six more Israeli hostages Saturday from the Gaza Strip, but the exchange for hundreds of Palestinian prisoners is shadowed by heightened tension between the adversaries that clouds the future of the fragile ceasefire deal.

Hamas on Sunday said Israel has gravely endangered a five-week-old Gaza truce by delaying the release of Palestinian prisoners under the deal because of the manner it has freed Israeli hostages.The first phase of the truce ends early in March and details of a planned subsequent phase have not been agreed.