The BBC was found to have committed a "major breach" of broadcasting rules by not revealing that the voice of a film about Gaza was the son of a Hamas administrator, according to UK media regulator Ofcom.
An probe by the media regulator into Gaza: How to Survive a Warzone has concluded that the programme was "significantly deceptive".
The chief executive of the broadcaster had earlier expressed regret, noting there had been "a significant failing in relation to accuracy".
The authority has directed the corporation to air a prime-time statement about its conclusions.
"Given this constitutes a serious breach of our regulations, we are directing the corporation to transmit a statement of our determinations against it on BBC Two at 21:00, with a schedule to be finalised," it said.
'Potential to Damage Credibility'
The watchdog's statement said: "Our investigation found that the documentary's omission to reveal that the voice's father held a position in the Hamas-controlled authority was substantially inaccurate.
"It meant that the public did not have essential details which may have been very significant to their assessment of the presenter and the details he provided.
"Trust is at the core of the bond between a media organization and its public, notably for a state-funded media outlet such as the British Broadcasting Corporation.
"This oversight had the possibility to damage the exceptionally strong amounts of trust that viewers would have invested in a documentary produced by the BBC about the Israel-Gaza war."
The film was pulled from the online platform in February after the presenter's familial connections emerged, and in this past July an internal BBC review found it violated the broadcaster's content policies on truthfulness.
A corporation official said: "The authority's determination is in accordance with the conclusions of Peter Johnston's review, that there was a significant failing in the film in relation to the BBC's Editorial Guidelines on truthfulness, which aligns with Rule 2.2 of the regulator's media standards.
"We issued an apology for this and we agree with Ofcom's decision in full. We will adhere to the directive as soon as the date and wording are determined."
