The BBC was found to have committed a "serious breach" of broadcasting rules by omitting to mention that the narrator of a film about the Gaza conflict was the offspring of a Hamas representative, as determined by UK media regulator Ofcom.
An inquiry by the media regulator into Gaza: How to Survive a Warzone has determined that the programme was "materially misleading".
The BBC's director general had already issued an apology, saying there had been "a major oversight in relation to accuracy".
Ofcom has directed the broadcaster to transmit a prime-time declaration about its findings.
"Given this constitutes a serious breach of our code, we are instructing the corporation to transmit a announcement 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 Undermine Confidence'
The watchdog's report declared: "Our probe concluded that the film's failure to disclose that the narrator's male guardian occupied a position in the Hamas-controlled authority was significantly deceptive.
"This implied that the public did not have critical information which may have been extremely pertinent to their judgment of the narrator and the content he provided.
"Confidence is at the core of the bond between a media organization and its public, particularly for a public service broadcaster such as the British Broadcasting Corporation.
"This oversight had the possibility to damage the exceptionally strong levels of trust that audiences would have placed in a documentary produced by the BBC about the Gaza conflict."
The programme was pulled from iPlayer in the month of February after the narrator's personal associations emerged, and in this past July an broadcaster's internal assessment determined it breached the broadcaster's editorial guidelines on factual correctness.
A BBC spokesperson 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 BBC's Editorial Guidelines on factual correctness, which aligns with Rule 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we comply with the authority's determination in complete. We will follow the sanction as soon as the date and language are determined."
