Israel is releasing 183 Palestinian prisoners in the latest exchange for Israeli hostages held in Gaza, part of a ceasefire that has paused the war but whose future is uncertain.

The hostages, who were made to give public speeches thanking the Hamas militants who had held them captive, looked frail and gaunt, sparking dismay and outrage in Israel.

While many expressed outrage over the frail appearance of Israeli hostages released Saturday, human rights groups raised concerns about the lack of similar indignation over the conditions faced by Palestinian prisoners.