In its assertion on Wednesday, the IDF said the presence of an armed guard with the convoy had not been flagged to it before the convoy set off, and that he was falsely recognized as a Hamas fighter. It also accused the convoy of deviating from the route co-ordinated with the army.

Notwithstanding “serious failures” in the course of that led to the killings, “the decisions of the commanders did not raise reasonable suspicion of criminal misconduct,” the IDF said.

Prior to the assertion by the three nations, Australia summoned Hillel Newman. Australian Foreign Minister Penny Wong said her nation was “outraged” by the Israeli authorities’s choice.

She also said there were still many “unanswered questions” about the strikes, including why, if the first strike on the convoy was “a catastrophic error”, two further strikes adopted just minutes aside.

Poland’s overseas ministry also said on Thursday that it was “very disappointed” and had summoned Israel’s ambassador in Warsaw.

The founder of World Central Kitchen, Jose Andres, described the choice as “wrong” and “painful for all of us”, demanding an impartial fee to examine.

Israeli Prime Minister Benjamin Netanyahu has not publicly responded to the newest assertion from the UK, Australia and Canada, but he beforehand said that the army had “unintentionally” killed the volunteers.

The assertion came after a harsh trade of phrases between UK Foreign Secretary Ed Miliband and Israeli Foreign Minister Gideon Saar over Israel’s plans to open tenders for the development of about 1,200 settlement houses in a strategically vital half of the occupied West Bank.

Israeli settlements are unlawful under worldwide legislation and plans to construct in the so-called E1 space – east of Jerusalem – have lengthy been internationally condemned.

Miliband condemned the publication of the tender as “an unacceptable and destructive act”, and called on Israel to “halt E1 plans immediately, retract the tender and stop all settlement expansion”.

In response, Saar said on social media that he rejected “outright” Miliband’s assertion.

“The Jewish people have the right to live throughout the Land of Israel, just as the British have the right to live in London and throughout the United Kingdom,” he wrote.