The British broadcaster engaged in a "serious breach" of media regulations by omitting to mention that the narrator of a documentary about Gaza was the child of a Hamas official, according to UK media regulator Ofcom.
An probe by the broadcasting watchdog into Gaza: How to Survive a Warzone has determined that the programme was "significantly deceptive".
The chief executive of the broadcaster had previously apologised, saying there had been "a serious error in relation to accuracy".
The authority has instructed the broadcaster to air a evening statement about its conclusions.
"As this represents a major infringement of our code, we are ordering the corporation to transmit a statement of our determinations against it on BBC2 at 9pm, with a timing to be confirmed," the statement read.
'Potential to Damage Confidence'
The authority's report declared: "Our probe determined that the film's omission to reveal that the narrator's male guardian held a position in the Hamas-run authority was significantly deceptive.
"It meant that the audience did not have essential details which may have been extremely pertinent to their assessment of the voice and the content he presented.
"Trust is at the center of the relationship between a broadcaster and its audience, notably for a national broadcasting corporation such as the British Broadcasting Corporation.
"This oversight had the potential to damage the significantly high degrees of confidence that audiences would have placed in a BBC factual programme about the Israel-Gaza war."
The programme was removed from the BBC's streaming service in February after the narrator's familial connections emerged, and in the month of July an internal BBC review determined it breached the broadcaster's journalistic standards on accuracy.
A BBC spokesperson commented: "The regulator's decision is in accordance with the findings of the corporation's inquiry, that there was a serious error in the documentary in relation to the corporation's content standards on accuracy, which aligns with Rule 2.2 of the regulator's media standards.
"We expressed regret for this and we accept Ofcom's decision in complete. We will follow the sanction as soon as the schedule and language are finalised."
