Troops are expected to advance to the densely-populated southern city of Rafah.
“It is incredibly ironic and frustrating how the US government detained him for two years and then funded and armed his killing,” Motaz Alhelou’s former lawyer said.
The Friday letter from officials in the US, Britain and European countries comes after a State Department meeting where employees challenged Biden's policy.
It isn’t the first time the Republican representative has questioned the existence of innocent Palestinians.
The Palestinian ambassador to the UK called the comments the "best shot in the arm".
The United States has denounced calls for the Israeli resettlement of Gaza, but stopped short of saying it would imperil US aid to Israel.
Tahir Ali was hauled in for a dressing down by Labour's chief whip.
An official who was present during Israel Katz's presentation described the video as "very bizarre."
The shadow foreign secretary had real trouble getting through his address on Saturday.
Husam Zomlot said the UK had suffered "reputational damage".