The British broadcaster was found to have committed a "major breach" of broadcasting rules by omitting to mention that the voice of a documentary about Gaza was the child of a Hamas representative, according to UK media regulator Ofcom.
An probe by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has determined that the programme was "materially misleading".
The chief executive of the broadcaster had already issued an apology, stating there had been "a major oversight in relation to accuracy".
The regulator has instructed the broadcaster to broadcast a prime-time statement about its conclusions.
"Given this constitutes a significant violation of our regulations, we are instructing the BBC to transmit a statement of our conclusions against it on BBC2 at nine o'clock in the evening, with a timing to be confirmed," it said.
'Possibility to Erode Confidence'
The watchdog's announcement declared: "The inquiry we conducted concluded that the programme's failure to disclose that the presenter's male guardian occupied a role in the Hamas-controlled administration was materially misleading.
"This implied that the audience did not have critical information which may have been very significant to their evaluation of the presenter and the content he provided.
"Confidence is at the heart of the bond between a media organization and its audience, especially for a national broadcasting corporation such as the public broadcaster.
"This oversight had the risk to erode the exceptionally strong amounts of trust that the public would have put in a BBC factual programme about the conflict in Gaza."
The film was pulled from the BBC's streaming service in February after the narrator's familial connections came to light, and in this past July an broadcaster's internal assessment found it violated the organization's journalistic standards on truthfulness.
A representative for the broadcaster said: "The regulator's decision is in accordance with the results of Peter Johnston's review, that there was a major oversight in the documentary in relation to the BBC's Editorial Guidelines on accuracy, which reflects Rule 2.2 of the regulator's media standards.
"We issued an apology for this and we comply with Ofcom's decision in complete. We will follow the sanction as soon as the schedule and wording are determined."
