A Hamas senior official Ismail al-Thawabteh said Shiri's body was “turned into pieces” in an Israeli airstrike - which Israel vehemently denies ever took place - and may have been “mixed with other bodies under the rubble”.
Foreign Secretary David Lammy said the killing of the two children, which Hamas denies, and the failure to return Shiri's body was "sick".
"The vile killing of the Bibas children by Hamas terrorists is sick and abhorrent, as is the failure to return the body of their mother Shiri to the grieving family," the Foreign Secretary posted on X.
The Red Cross collected a body from the Gaza Strip that Hamas claimed is Shiri, two officials told The Times of Israel on Friday.
He added in a video statement: "We will act with determination to bring Shiri home along with all our hostages - both living and dead - and ensure Hamas pays the full price for this cruel and evil violation of the agreement.".
