Who is Yarden Bibas? Are Israeli hostage's wife Shiri and sons Ariel and Kfir dead?

Israel said it has 'grave concerns for their fate' of Shiri Bibas and her sons, Ariel, 5, and Kfir, 2

Yarden Bibas and family Yarden Bibas with Shiri Bibas, Ariel Bibas and Kfir Bibas (File)

Hamas has released hostage Yarden Bibas along with two others, Keith Siegel and Ofer Calderon on Saturday.

While happy with the return of Yarden, 35, his family members are worried about his wife Shiri Bibas, 34, and two sons, five-year-old Ariel Bibas and two-year-old Kfir Bibas.

Hamas was scheduled to release all living women and children first before returning elderly and sick men held by them. However, Hamas's failure to return Shiri and her sons has worried their relatives. 

Israel said it has "grave concerns for their fate". Though Hamas claimed that the trio was killed in an Israeli airstrike, Israel is yet to confirm these claims.

Yarden met his family at the IDF facility near Re'im, following which he was flown to a hospital in central Israel in a helicopter.

Ofer Calderon was also airlifted in an IAF helicopter to the central Israel hospital.

Later, Keith Siegel who was handed over to the Red Cross at the Gaza Port, was transferred to the IDF troops in Gaza. He will undergo initial checkup at an IDF facility, following which he will meet his family members.

This comes two days after Hamas released Arbel Yehoud, Agam Berger and Gadi Moses.

Last Saturday, four women Israeli surveillance soldiers, Naama Levy, Liri Albag, Daniella Gilboa and Karina Ariev, were released by Hamas. Israel released 50 prisoners for each of the soldiers. 

On January 19, three civilian women, Romi Gonen, Emily Damari and Doron Steinbrecher, were also released in exchange of 90 Palestinians.

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