The armed wing of militant group Hamas said on Friday it will release Israeli hostages Eliya Cohen, Omer Shem Tov, Tal Shoham, Omer Wenkert, Hisham al-Sayed and Avera Mengisto on Saturday.
Hisham al-Sayed and Avera Mengisto are civilians, who entered Gaza a decade ago and have been held there since.
Hamas also said on Friday it would look into the possibility of an error or that human remains were mixed due to Israeli airstrikes, after the Israeli military said one of the bodies released by Hamas on Thursday did not belong to any of the hostages held in Gaza.
The group's official statement echoed that of one earlier from the group's Gaza government media office director Ismail Al-Thawabta.
Israeli Prime Minister Benjamin Netanyahu said that Israel would make Hamas pay for failing to release the body of hostage Shiri Bibas as agreed, in the latest potential threat to the month-old Gaza ceasefire.
Israeli specialists said one of four bodies handed over by Hamas on Thursday was an unidentified woman and not Bibas.
Netanyahu accused Hamas of acting "in an unspeakably cynical manner" by placing the body of a Gaza woman in the coffin instead of Bibas, who was kidnapped along with her two sons, Kfir and Ariel, and her husband, Yarden, during the Hamas attack on Israel on October 7, 2023.
The bodies of Kfir and Ariel were among those handed over and identified.
"We will act with determination to bring Shiri home along with all our hostages - both living and dead - and ensure Hamas pays the full price for this cruel and evil violation of the agreement," Netanyahu said in a video statement.
Al-Thawabta said Shiri Bibas' remains appear to have been mixed with other human remains after being buried in the rubble of a building destroyed in an Israeli airstrike.
"Netanyahu himself issued the orders for the direct and merciless bombing, and he bears full responsibility for killing her and her children," he said in a statement.
