The rise of Izz al-Din al-Haddad in the chain of command suggests the group will hold firm to its position demanding a total end to the war before releasing all remaining hostages.
Gideon Saar, the Israeli foreign minister, cited “positive signs” in the long-moribund cease-fire talks to end the war in Gaza and free the hostages held there.
Reporters photographing a display for “Midnight Hammer,” the name of the American operation to bomb Iran’s nuclear sites, during a news conference on Sunday.