The BBC was found to have committed a "significant breach" of media regulations by failing to disclose that the narrator of a documentary about Gaza was the son of a Hamas representative, as determined by UK media regulator Ofcom.
An inquiry by the media regulator into the programme Gaza: How to Survive a Warzone has found that the programme was "substantially inaccurate".
The chief executive of the broadcaster had previously apologised, stating there had been "a major oversight in relation to factual correctness".
The regulator has instructed the corporation to broadcast a prime-time statement about its conclusions.
"Since this amounts to a major infringement of our code, we are directing the BBC to air a announcement of our findings against it on the BBC's second channel at nine o'clock in the evening, with a schedule to be confirmed," it said.
'Risk to Undermine Confidence'
The authority's announcement said: "The inquiry we conducted found that the programme's omission to reveal that the voice's father held a role in the Hamas-run administration was substantially inaccurate.
"Consequently that the audience did not have critical information which may have been highly relevant to their assessment of the voice and the content he presented.
"Trust is at the center of the bond between a broadcaster and its audience, especially for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the potential to damage the very considerable amounts of confidence that audiences would have placed in a BBC factual programme about the conflict in Gaza."
The programme was removed from iPlayer in last February after the narrator's family links emerged, and in July an broadcaster's internal assessment concluded it breached the broadcaster's editorial guidelines on accuracy.
A BBC spokesperson commented: "The regulator's decision is in agreement with the conclusions of the internal assessment, that there was a significant failing in the programme in relation to the BBC's Editorial Guidelines on accuracy, which aligns with clause 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we accept Ofcom's decision in full. We will follow the sanction as soon as the date and wording are confirmed."
