"I set out the Government's unequivocal condemnation of the appalling killing of seven World Central Kitchen aid workers, including three British Nationals," Britain's Minister for Development and Africa, Andrew Mitchell, said.

"I requested a quick and transparent investigation, shared with the international community, and full accountability."

Separately, Foreign Secretary David Cameron posted on X that he had spoken with his Israeli counterpart Israel Katz to underline that the deaths were "completely unacceptable".

"Israel must urgently explain how this happened and make major changes to ensure safety of aid workers on the ground," Cameron said in the post.

(Reporting by Farouq Suleiman and William James, Editing by Paul Sandle)