The BBC committed a "serious breach" of industry standards by not revealing that the narrator of a programme about Gaza was the child of a Hamas representative, as ruled by British broadcasting authority Ofcom.
An probe by the broadcasting watchdog into Gaza: How to Survive a Warzone has concluded that the programme was "significantly deceptive".
The chief executive of the broadcaster had earlier expressed regret, stating there had been "a serious error in relation to factual correctness".
The authority has instructed the broadcaster to broadcast a peak-time statement about its findings.
"Given this constitutes a major infringement of our rules, we are directing the corporation to transmit a announcement of our conclusions against it on BBC2 at 21:00, with a date to be determined," the regulator stated.
'Possibility to Undermine Credibility'
The authority's announcement said: "The inquiry we conducted found that the programme's lack of disclosure that the voice's father occupied a role in the Hamas-run administration was substantially inaccurate.
"This implied that the audience did not have vital facts which may have been extremely pertinent to their evaluation of the voice and the content he provided.
"Credibility is at the heart of the relationship between a broadcaster and its public, particularly for a public service broadcaster such as the British Broadcasting Corporation.
"This error had the risk to undermine the exceptionally strong levels of trust that audiences would have invested in a documentary produced by the BBC about the Gaza conflict."
The film was removed from the BBC's streaming service in February after the boy's family links emerged, and in July an broadcaster's internal assessment found it infringed the broadcaster's journalistic standards on truthfulness.
A representative for the broadcaster stated: "The Ofcom ruling is in accordance with the findings of the internal assessment, that there was a significant failing in the programme in relation to the corporation's content standards on factual correctness, which aligns with regulation 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we accept the authority's determination in full. We will adhere to the directive as soon as the date and wording are determined."
