Eight of the remaining hostages set to be released by Hamas in the first phase of a ceasefire agreement with Israel are dead, according to an Israeli government spokesperson.

The Palestinian Islamist group Hamas has handed over to mediators a list showing that 25 Israeli hostages are still alive, out of 33 scheduled for release, an official of the group told Reuters on Monday.

Hamas will release more Israeli hostages this week, officials said Monday, including Agam Berger, who was not released along with four of her colleagues on Saturday.