The British broadcaster committed a "serious breach" of media regulations by omitting to mention that the presenter of a film about Gaza was the offspring of a Hamas official, according to UK media regulator Ofcom.
An inquiry by the media regulator into the documentary titled Gaza: How to Survive a Warzone has found that the programme was "substantially inaccurate".
The chief executive of the broadcaster had earlier expressed regret, saying there had been "a serious error in relation to accuracy".
The authority has instructed the corporation to transmit a prime-time announcement about its decisions.
"Given this constitutes a significant violation of our rules, we are instructing the broadcaster to transmit a message of our determinations against it on BBC2 at 21:00, with a schedule to be determined," the statement read.
'Possibility to Erode Trust'
The watchdog's report stated: "Our investigation determined that the programme's failure to disclose that the voice's father served in a role in the Hamas-run government was materially misleading.
"This implied that the audience did not have vital facts which may have been highly relevant to their evaluation of the voice and the content he provided.
"Confidence is at the heart of the connection between a television network and its public, notably for a public service broadcaster such as the BBC.
"This error had the risk to erode the very considerable levels of trust that audiences would have invested in a BBC factual programme about the Gaza conflict."
The documentary was withdrawn from the BBC's streaming service in February after the narrator's personal associations came to light, and in this past July an broadcaster's internal assessment found it infringed the corporation's content policies on factual correctness.
A representative for the broadcaster said: "The Ofcom ruling is in accordance with the results of the internal assessment, that there was a major oversight in the documentary in relation to the broadcaster's journalistic policies on accuracy, which aligns with regulation 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we agree with the regulator's ruling in complete. We will follow the directive as soon as the schedule and language are finalised."
