The BBC committed a "major breach" of media regulations by failing to disclose that the presenter of a film about the Gaza situation was the son of a Hamas official, as ruled by British broadcasting authority Ofcom.
An investigation by the media regulator into Gaza: How to Survive a Warzone has found that the programme was "significantly deceptive".
The chief executive of the broadcaster had already issued an apology, noting there had been "a significant failing in relation to accuracy".
The authority has instructed the BBC to air a prime-time statement about its decisions.
"Since this amounts to a serious breach of our rules, we are instructing the broadcaster to air a announcement of our conclusions against it on BBC2 at nine o'clock in the evening, with a timing to be finalised," the statement read.
'Possibility to Undermine Trust'
The regulator's report said: "Our investigation found that the film's failure to disclose that the presenter's father held a post in the Hamas-controlled government was materially misleading.
"This implied that the audience did not have essential details which may have been highly relevant to their assessment of the narrator and the content he presented.
"Trust is at the heart of the relationship between a broadcaster and its audience, notably for a national broadcasting corporation such as the British Broadcasting Corporation.
"This error had the possibility to damage the exceptionally strong degrees of credibility that the public would have invested in a factual film from the broadcaster about the Israel-Gaza war."
The film was removed from the BBC's streaming service in last February after the presenter's personal associations were revealed, and in the month of July an internal BBC review found it violated the broadcaster's editorial guidelines on accuracy.
A BBC spokesperson stated: "The Ofcom ruling is in accordance with the conclusions of the corporation's inquiry, that there was a serious error in the programme in relation to the corporation's content standards on factual correctness, which corresponds to regulation 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we accept Ofcom's decision in complete. We will adhere to the directive as soon as the schedule and language are determined."
