The BBC committed a "significant breach" of media regulations by not revealing that the presenter of a documentary about Gaza was the son of a Hamas official, according to British broadcasting authority Ofcom.
An investigation by the broadcasting watchdog into Gaza: How to Survive a Warzone has concluded that the film was "substantially inaccurate".
The chief executive of the broadcaster had earlier expressed regret, noting there had been "a significant failing in relation to truthfulness".
Ofcom has directed the corporation to air a prime-time announcement about its decisions.
"Given this constitutes a serious breach of our rules, we are ordering the BBC to broadcast a statement of our findings against it on the BBC's second channel at 21:00, with a timing to be determined," the statement read.
'Potential to Damage Trust'
The regulator's announcement stated: "Our probe found that the film's omission to reveal that the presenter's parent held a post in the Hamas-run administration was materially misleading.
"It meant that the viewers did not have vital facts which may have been very significant to their judgment of the presenter and the content he presented.
"Confidence is at the heart of the connection between a broadcaster and its public, especially for a national broadcasting corporation such as the British Broadcasting Corporation.
"This error had the risk to damage the exceptionally strong degrees of trust that audiences would have placed in a documentary produced by the BBC about the conflict in Gaza."
The documentary was withdrawn from iPlayer in the month of February after the narrator's familial connections came to light, and in this past July an corporation's own inquiry determined it breached the organization's content policies on truthfulness.
A representative for the broadcaster stated: "The regulator's decision is in accordance with the findings of the internal assessment, that there was a serious error in the film in relation to the broadcaster's journalistic policies on accuracy, which aligns with regulation 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we comply with Ofcom's decision in its entirety. We will follow the directive as soon as the schedule and wording are confirmed."
