The BBC engaged in a "serious breach" of broadcasting rules by not revealing that the narrator of a programme about the Gaza situation was the child of a Hamas administrator, according to regulatory body Ofcom.
An probe by Ofcom into the programme Gaza: How to Survive a Warzone has determined that the film was "significantly deceptive".
The chief executive of the broadcaster had earlier expressed regret, noting there had been "a serious error in relation to truthfulness".
The regulator has ordered the BBC to transmit a peak-time announcement about its decisions.
"Given this constitutes a major infringement of our code, we are directing the corporation to air a statement of our determinations against it on the BBC's second channel at 21:00, with a timing to be determined," it said.
'Possibility to Damage Trust'
The watchdog's statement declared: "Our investigation found that the film's omission to reveal that the voice's male guardian held a role in the Hamas-controlled administration was substantially inaccurate.
"This implied that the public did not have vital facts which may have been very significant to their judgment of the presenter and the content he shared.
"Confidence is at the heart of the bond between a television network and its viewers, particularly for a state-funded media outlet such as the British Broadcasting Corporation.
"This oversight had the potential to damage the significantly high amounts of confidence that viewers would have put in a BBC factual programme about the Israel-Gaza war."
The programme was pulled from iPlayer in the month of February after the narrator's personal associations were revealed, and in this past July an internal BBC review concluded it infringed the broadcaster's journalistic standards on accuracy.
A BBC spokesperson stated: "The authority's determination is in line with the findings of Peter Johnston's review, that there was a major oversight in the documentary in relation to the corporation's content standards on truthfulness, which corresponds to regulation 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we comply with Ofcom's decision in complete. We will adhere to the sanction as soon as the date and wording are determined."
