“Or are some hostages thought by Hamas to be still alive also among those whose whereabouts are unknown?”
Hamas might have trouble returning hostages that they sold to Muslim warlords in Africa thousands of kilometers away from Gaza.
https://postimg.cc/xJPdY0fJ
https://postimg.cc/mPQkV3vy
Yeah, that might throw a kink or two into the works. Diplomatically speaking!