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.

The hostages are the last living hostages to be freed in the first phase of a fragile deal with Israel, adding to pressure for both sides to start negotiations to permanently end the war.

Civilians Hisham al-Sayed and Avera Mengistu had a history of mental illness, according to comments from their families and a 2017 report from Human Rights Watch.