Buses carrying freed Palestinian prisoners left an Israeli prison on Thursday, after chaos during the release by Gaza militants of three Israeli hostages and five Thais led to a brief delay in the process.

At around dusk, an AFP journalist saw two buses carrying the inmates leave from Ofer Prison in the occupied West Bank, after Israel said it had received assurance from mediators over the future "safe release" of captives.

Prime Minister Benjamin Netanyahu's office had earlier Thursday, around mid-afternoon, said the prisoner release would be suspended until such assurances were obtained.

Israel was due to free 110 prisoners, including 30 minors, in exchange for the three Israelis released on Thursday, the Palestinian Prisoners' Club advocacy group said.

It is the third hostage-prisoner exchange under a 19 January ceasefire deal aimed at ending the war in Gaza.

Another hostage and prisoner release is scheduled for Saturday, with three Israeli men due to be set free.

Militants in Gaza earlier Thursday freed the three Israelis, as well as five Thais, captured in Hamas's 7 October 2023 attack on Israel.

Netanyahu had denounced what he called "shocking scenes" during the hostage releases in Khan Yunis, where television images showed gunmen struggling to control hundreds of Gazans seeking to witness the handover.

First to be freed Thursday was 20-year-old Israeli soldier Agam Berger, who was handed over to International Committee of the Red Cross officials in Jabalia, northern Gaza.

Before her release, footage showed her on a stage with masked Hamas members in distinctive green headbands, being prompted to wave to onlookers.

Israel's military said the three Israeli hostages and five Thais were now back in Israel and were taken to hospitals.

The two other freed Israelis are civilians Gadi Moses, 80, and Arbel Yehud, 29, both of whom also hold German nationality.

"We are relieved and rejoice with all the hostages who have been released," German Chancellor Olaf Scholz said on X. He urged the release of all remaining captives.

Netanyahu's office named the freed Thais as Watchara Sriaoun, Pongsak Tanna, Sathian Suwannakham, Surasak Lamnau and Bannawat Saethao.

Thailand's Prime Minister Paetongtarn Shinawatra said she was "elated" that they were out of captivity.

"It is confirmed everyone, my son did not die. Thank you God," a sobbing Wiwwaeo Sriaoun said at her home in rural Thailand as she heard confirmation her farm worker son was among those freed.

In devastated Khan Yunis, dense crowds gathered to catch a glimpse of Yehud and Moses near the childhood home of Hamas leader Yahya Sinwar, who Israel killed in October. 

On Wednesday, the Moses family said it had "received with great excitement the wonderful news of our beloved Gadi's return".

The ceasefire hinges on the release of Israeli hostages taken during Hamas's 7 October 2023 attack, in exchange for around 1,900 people -- mostly Palestinians -- in Israeli custody.

Before Thursday, Hamas had released seven hostages, with 290 prisoners freed in exchange.