The BBC was found to have committed a "serious breach" of broadcasting rules by omitting to mention that the narrator of a documentary about the Gaza situation was the child of a Hamas representative, according to UK media regulator Ofcom.
An inquiry by the media regulator into Gaza: How to Survive a Warzone has found that the programme was "significantly deceptive".
The BBC's director general had earlier expressed regret, saying there had been "a major oversight in relation to accuracy".
The regulator has instructed the corporation to air a prime-time announcement about its decisions.
"Since this amounts to a major infringement of our code, we are ordering the BBC to transmit a statement of our determinations against it on BBC Two at nine o'clock in the evening, with a schedule to be finalised," the regulator stated.
'Risk to Damage Confidence'
The watchdog's report declared: "Our investigation found that the programme's failure to disclose that the presenter's parent held a post in the Hamas-controlled administration was substantially inaccurate.
"Consequently that the viewers did not have critical information which may have been very significant to their judgment of the narrator and the information he provided.
"Confidence is at the core of the relationship between a broadcaster and its public, particularly for a national broadcasting corporation such as the public broadcaster.
"This oversight had the risk to damage the very considerable degrees of confidence that audiences would have placed in a BBC factual programme about the conflict in Gaza."
The film was pulled from iPlayer in the month of February after the narrator's family links emerged, and in this past July an broadcaster's internal assessment determined it violated the corporation's journalistic standards on factual correctness.
A corporation official stated: "The Ofcom ruling is in line with the findings of the corporation's inquiry, that there was a major oversight in the film in relation to the corporation's content standards on accuracy, which reflects Rule 2.2 of the regulator's media standards.
"We expressed regret for this and we agree with the authority's determination in complete. We will follow the sanction as soon as the date and wording are confirmed."
