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 on Sunday published a letter purportedly written by former Israeli hostage Keith Siegel before his release, in which he thanked his captors and criticized the Israeli government. His family says Hamas forced Siegel to write a detailed "thank you" letter.