The BBC was found to have committed a "major breach" of broadcasting rules by failing to disclose that the narrator of a film about the Gaza conflict was the child of a Hamas official, according to UK media regulator Ofcom.
An inquiry by the media regulator into the programme Gaza: How to Survive a Warzone has determined that the film was "significantly deceptive".
The head of the BBC had earlier expressed regret, stating there had been "a significant failing in relation to accuracy".
The authority has ordered the corporation to air a evening declaration about its decisions.
"Since this amounts to a significant violation of our regulations, we are instructing the broadcaster to transmit a announcement of our determinations against it on BBC2 at nine o'clock in the evening, with a date to be determined," the regulator stated.
'Risk to Undermine Trust'
The regulator's report declared: "The inquiry we conducted concluded that the film's lack of disclosure that the narrator's parent held a position in the Hamas-administered administration was substantially inaccurate.
"Consequently that the public did not have vital facts which may have been highly relevant to their assessment of the presenter and the content he provided.
"Trust is at the center of the relationship between a broadcaster and its audience, notably for a public service broadcaster such as the public broadcaster.
"This failing had the risk to undermine the significantly high levels of trust that viewers would have invested in a BBC factual programme about the conflict in Gaza."
The film was withdrawn from the BBC's streaming service in February after the narrator's familial connections were revealed, and in July an internal BBC review concluded it infringed the corporation's journalistic standards on factual correctness.
A corporation official commented: "The regulator's decision is in agreement with the findings of Peter Johnston's review, that there was a significant failing in the programme in relation to the broadcaster's journalistic policies on factual correctness, which corresponds to regulation 2.2 of the regulator's media standards.
"We issued an apology for this and we comply with the authority's determination in complete. We will follow the directive as soon as the schedule and wording are confirmed."
