The BBC was found to have committed a "significant breach" of media regulations by not revealing that the narrator of a film about Gaza was the child of a Hamas representative, as determined by UK media regulator Ofcom.
An probe by Ofcom into the programme Gaza: How to Survive a Warzone has concluded that the film was "materially misleading".
The head of the BBC had previously apologised, saying there had been "a major oversight in relation to factual correctness".
Ofcom has instructed the corporation to broadcast a prime-time statement about its conclusions.
"Given this constitutes a major infringement of our rules, we are directing the corporation to transmit a statement of our conclusions against it on BBC2 at 21:00, with a timing to be confirmed," the statement read.
'Possibility to Erode Credibility'
The regulator's report stated: "Our investigation found that the film's omission to reveal that the narrator's father occupied a position in the Hamas-controlled government was substantially inaccurate.
"It meant that the public did not have critical information which may have been very significant to their judgment of the voice and the information he shared.
"Credibility is at the center of the connection between a television network and its public, particularly for a state-funded media outlet such as the British Broadcasting Corporation.
"This error had the possibility to damage the exceptionally strong levels of credibility that audiences would have put in a BBC factual programme about the Israel-Gaza war."
The film was withdrawn from the online platform in the month of February after the narrator's familial connections emerged, and in July an internal BBC review concluded it violated the corporation's editorial guidelines on factual correctness.
A representative for the broadcaster said: "The authority's determination is in line with the results of Peter Johnston's review, that there was a major oversight in the programme in relation to the BBC's Editorial Guidelines on truthfulness, which reflects regulation 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we accept the authority's determination in full. We will follow the sanction as soon as the timing and wording are confirmed."
