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 child of a Hamas administrator, according to regulatory body Ofcom.
An probe by the broadcasting watchdog into Gaza: How to Survive a Warzone has concluded that the documentary was "materially misleading".
The chief executive of the broadcaster had already issued an apology, noting there had been "a serious error in relation to truthfulness".
Ofcom has instructed the broadcaster to transmit a peak-time statement about its findings.
"Given this constitutes a major infringement of our rules, we are directing the corporation to transmit a announcement of our determinations against it on BBC2 at nine o'clock in the evening, with a schedule to be determined," it said.
'Potential to Undermine Credibility'
The regulator's report said: "Our probe found that the documentary's lack of disclosure that the presenter's parent occupied a position in the Hamas-administered administration was significantly deceptive.
"Consequently that the audience did not have critical information which may have been highly relevant to their judgment of the narrator and the details he presented.
"Confidence is at the center of the bond between a media organization and its viewers, especially for a public service broadcaster such as the British Broadcasting Corporation.
"This oversight had the risk to undermine the exceptionally strong degrees of credibility that audiences would have placed in a factual film from the broadcaster about the conflict in Gaza."
The documentary was pulled from iPlayer in last February after the presenter's personal associations were revealed, and in this past July an corporation's own inquiry concluded it infringed the broadcaster's editorial guidelines on truthfulness.
A corporation official commented: "The Ofcom ruling is in agreement with the results of the internal assessment, that there was a serious error in the film in relation to the broadcaster's journalistic policies on truthfulness, which reflects Rule 2.2 of the regulator's media standards.
"We expressed regret for this and we comply with the regulator's ruling in complete. We will adhere to the directive as soon as the timing and wording are determined."
