Israel accused Hamas of subjecting its hostages to humiliation, while Hamas said the delayed release of Palestinian prisoners is a violation of the ceasefire deal.

The six Israelis were the last living captives set to be released in the first phase of the cease-fire. The agreement, strained for weeks, has an uncertain future.

Hamas released six hostages from Gaza on Saturday. Israel was due to release 620 Palestinian detainees in return, but has delayed the exchange citing further security reviews.