The 62-year-old was targeted by Israel in an operation in Gaza.
The US is vowing to boost efforts to end the war in Gaza, following the death of Hamas leader Yahya Sinwar.
Secretary of state Antony Blinken says the militant group had turned down offers of a hostage release deal "on multiple occasions".
The 62-year-old was targeted by Israel in an operation in Gaza.

Analysis: Damning Reports Detail Rot, Fire Risks And Rodents At "Temporary" Celbridge Primary School
Major Curragh Community College Project Moves Ahead After Years Of False Starts
US Supreme Court Rules Against President Trump's Global Tariffs
Plans For Walking Trail Within Castletown House Lands Under Consideration Subject To Removal Of Laurel
Council Blames Stolen Cars As It Refuses Warning Signs At Crash-Prone Bridge In Celbridge
Naas No-Shows Add To Driving Test Pressure As Kildare Test Queue Hits 1,975
Naas Hospital Promised Just 21 Extra Mental Health Beds At Lakeview Ward - With No Timeline In Sight
R405 Hazelhatch Road To Close Between Loughtown Road And Athgoe Road For Major Pipeline Works