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.

Israel’s military said the body of Yosef Al Zaydani was recovered in an underground tunnel in Gaza and that it was examining whether a second body was that of another hostage.

Hamas has named 34 hostages, some of them believed to have died in captivity, who it says it would return to Israel in the first phase of an evolving if still elusive ceasefire in Gaza.

The Israeli military says its troops have found the body of a Bedouin Arab hostage held by Hamas in Gaza, as well as evidence that suggests another may also be dead. The body of Yousef Zyadna, 53, was recovered from an underground tunnel in the southern Rafah area on Tuesday.