Why did Israel delay the release of Palestinian prisoners?

Israel has postponed the release of more than 600 Palestinian prisoners despite Hamas earlier releasing six Israeli captives. The group calls it a 'blatant violation' of the Gaza ceasefire deal. So, what's the reason for Israel's decision? And how will it affect the fragile ceasefire?  In this Episode:   Alon Liel, Former Director, Israel's Foreign Ministry.  Xavier Abu Eid, Political Analyst.  Akiva Eldar, Contributor, Haaretz. Host: Cyril Vanier Connect with us:@AJEPodcasts on Twitter, Instagram, Facebook At Al Jazeera Podcasts, we want to hear from you, our listeners. So, please head to https://www.aljazeera.com/survey and tell us your thoughts about this show and other Al Jazeera podcasts. It only takes a few minutes!