Israel confirmed on Friday that the remains of a hostage found killed in Gaza were of Hamza Ziyadne, the son of deceased hostage Youssef Ziyadne, whose body was found beside him in an underground tunnel near the southern city of Rafah.

The hostage, Youssef Ziyadne, an Arab Bedouin, was seized along with three grown children on Oct. 7, 2023. Two of them were released, but there is “serious concern” about the fate of the third.

The Israeli military said that it had retrieved the body of a hostage who had been held in the Gaza Strip, as the Biden administration struggles to secure a cease-fire deal that would bring home dozens of hostages.