The BBC committed a "serious breach" of media regulations by omitting to mention that the narrator of a documentary about Gaza was the child of a Hamas administrator, as ruled by British broadcasting authority Ofcom.
An investigation by the broadcasting watchdog into Gaza: How to Survive a Warzone has found that the documentary was "significantly deceptive".
The head of the BBC had already issued an apology, noting there had been "a serious error in relation to accuracy".
The authority has directed the broadcaster to broadcast a peak-time statement about its findings.
"As this represents a significant violation of our code, we are directing the BBC to air a statement of our findings against it on BBC Two at nine o'clock in the evening, with a date to be determined," the statement read.
'Risk to Erode Trust'
The authority's announcement declared: "Our investigation found that the programme's lack of disclosure that the narrator's parent held a position in the Hamas-administered government was significantly deceptive.
"It meant that the audience did not have critical information which may have been very significant to their assessment of the voice and the details he shared.
"Trust is at the center of the connection between a broadcaster and its public, notably for a national broadcasting corporation such as the BBC.
"This oversight had the potential to damage the very considerable degrees of confidence that audiences would have put in a BBC factual programme about the Israel-Gaza war."
The documentary was pulled from the BBC's streaming service in February after the boy's family links emerged, and in July an internal BBC review determined it breached the corporation's journalistic standards on accuracy.
A representative for the broadcaster commented: "The Ofcom ruling is in line with the results of the corporation's inquiry, that there was a significant failing in the documentary in relation to the broadcaster's journalistic policies on truthfulness, which reflects Rule 2.2 of the regulator's media standards.
"We issued an apology for this and we accept the authority's determination in full. We will follow the penalty as soon as the timing and wording are finalised."
