It is believed that at least two of the six American hostages still held in Gaza are alive — Sagui Dekel-Chen, 35, who grew up in Bloomfield, Connecticut, and Edan Alexander, 19, from Tenafly, New Jersey. Four other Americans are believed to have been killed in captivity.

Hamas-led militants have released three gaunt, frail-looking Israeli civilian men held for the past 16 months and Israel freed 183 Palestinian prisoners as part of a fragile agreement that has paused the war in the Gaza Strip.