The BBC was found to have committed a "major breach" of industry standards by not revealing that the presenter of a programme about the Gaza conflict was the offspring of a Hamas representative, according to UK media regulator Ofcom.
An probe by the broadcasting watchdog into Gaza: How to Survive a Warzone has found that the programme was "substantially inaccurate".
The head of the BBC had previously apologised, stating there had been "a serious error in relation to accuracy".
The authority has directed the broadcaster to broadcast a evening statement about its decisions.
"Given this constitutes a major infringement of our code, we are ordering the corporation to broadcast a message of our findings against it on BBC2 at nine o'clock in the evening, with a timing to be determined," the regulator stated.
'Possibility to Undermine Trust'
The regulator's statement said: "The inquiry we conducted concluded that the documentary's failure to disclose that the narrator's male guardian occupied a role in the Hamas-administered administration was significantly deceptive.
"This implied that the public did not have vital facts which may have been very significant to their evaluation of the narrator and the details he shared.
"Confidence is at the center of the bond between a television network and its audience, especially for a national broadcasting corporation such as the BBC.
"This oversight had the possibility to erode the exceptionally strong amounts of trust that viewers would have invested in a factual film from the broadcaster about the Israel-Gaza war."
The film was withdrawn from the online platform in the month of February after the presenter's familial connections came to light, and in this past July an corporation's own inquiry found it violated the broadcaster's editorial guidelines on accuracy.
A representative for the broadcaster stated: "The regulator's decision is in line with the results of Peter Johnston's review, that there was a serious error in the programme in relation to the broadcaster's journalistic policies on accuracy, which reflects Rule 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we agree with the regulator's ruling in its entirety. We will follow the sanction as soon as the schedule and wording are confirmed."
