The BBC was found to have committed a "major breach" of broadcasting rules by not revealing that the narrator of a film about the Gaza conflict was the offspring of a Hamas administrator, as ruled by regulatory body Ofcom.
An investigation by Ofcom into the programme Gaza: How to Survive a Warzone has found that the programme was "substantially inaccurate".
The chief executive of the broadcaster had earlier expressed regret, noting there had been "a significant failing in relation to factual correctness".
Ofcom has instructed the BBC to air a evening declaration about its conclusions.
"Given this constitutes a significant violation of our code, we are directing the broadcaster to air a statement of our determinations against it on BBC Two at nine o'clock in the evening, with a schedule to be determined," the regulator stated.
'Risk to Erode Credibility'
The authority's statement declared: "Our probe concluded that the film's omission to reveal that the narrator's parent served in a position in the Hamas-administered government was significantly deceptive.
"It meant that the viewers did not have critical information which may have been extremely pertinent to their evaluation of the voice and the details he provided.
"Confidence is at the center of the bond between a broadcaster and its public, notably for a state-funded media outlet such as the public broadcaster.
"This oversight had the potential to damage the very considerable degrees of credibility that viewers would have invested in a BBC factual programme about the Gaza conflict."
The programme was withdrawn from iPlayer in February after the presenter's personal associations came to light, and in July an broadcaster's internal assessment concluded it infringed the corporation's editorial guidelines on truthfulness.
A representative for the broadcaster stated: "The authority's determination is in accordance with the findings of the corporation's inquiry, that there was a major oversight in the documentary in relation to the broadcaster's journalistic policies on factual correctness, which aligns with regulation 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we agree with the regulator's ruling in full. We will follow the sanction as soon as the schedule and wording are determined."
