The public service broadcaster committed a "significant breach" of industry standards by failing to disclose that the narrator of a documentary about Gaza was the child of a Hamas administrator, as ruled by UK media regulator Ofcom.
An probe by the media regulator into the programme Gaza: How to Survive a Warzone has found that the film was "significantly deceptive".
The chief executive of the broadcaster had earlier expressed regret, noting there had been "a major oversight in relation to factual correctness".
Ofcom has instructed the BBC to broadcast a prime-time statement about its conclusions.
"Since this amounts to a significant violation of our rules, we are directing the broadcaster to transmit a announcement of our determinations against it on the BBC's second channel at 9pm, with a schedule to be determined," the statement read.
'Potential to Damage Confidence'
The watchdog's statement said: "The inquiry we conducted found that the documentary's failure to disclose that the narrator's parent served in a role in the Hamas-administered government was substantially inaccurate.
"It meant that the viewers did not have essential details which may have been very significant to their assessment of the voice and the information he provided.
"Trust is at the heart of the connection between a broadcaster and its public, particularly for a public service broadcaster such as the BBC.
"This oversight had the risk to damage the very considerable degrees of trust that audiences would have put in a factual film from the broadcaster about the Israel-Gaza war."
The documentary was withdrawn from the online platform in last February after the narrator's family links were revealed, and in July an internal BBC review concluded it violated the corporation's journalistic standards on accuracy.
A BBC spokesperson said: "The authority's determination is in line with the conclusions of the corporation's inquiry, that there was a major oversight in the programme in relation to the broadcaster's journalistic policies on factual correctness, which corresponds to Rule 2.2 of the regulator's media standards.
"We expressed regret for this and we agree with Ofcom's decision in its entirety. We will adhere to the sanction as soon as the schedule and wording are confirmed."
