The BBC was found to have committed a "significant breach" of broadcasting rules by not revealing that the presenter of a programme about the Gaza situation was the son of a Hamas administrator, as ruled by regulatory body Ofcom.
An inquiry by the media regulator into Gaza: How to Survive a Warzone has concluded that the documentary was "materially misleading".
The chief executive of the broadcaster had already issued an apology, stating there had been "a major oversight in relation to factual correctness".
The regulator has directed the BBC to transmit a evening statement about its findings.
"As this represents a serious breach of our rules, we are directing the BBC to broadcast a announcement of our findings against it on BBC2 at 9pm, with a timing to be finalised," it said.
'Risk to Erode Credibility'
The watchdog's statement said: "The inquiry we conducted determined that the film's lack of disclosure that the narrator's father served in a position in the Hamas-run administration was substantially inaccurate.
"This implied that the public did not have essential details which may have been highly relevant to their assessment of the presenter and the content he provided.
"Credibility is at the core of the connection between a television network and its viewers, notably for a national broadcasting corporation such as the British Broadcasting Corporation.
"This oversight had the possibility to erode the very considerable degrees of trust that audiences would have invested in a BBC factual programme about the Israel-Gaza war."
The film was removed from the online platform in last February after the boy's family links were revealed, and in the month of July an internal BBC review concluded it breached the corporation's content policies 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 major oversight in the documentary in relation to the broadcaster's journalistic policies on accuracy, which reflects regulation 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we comply with the authority's determination in full. We will adhere to the directive as soon as the date and wording are determined."
