The British broadcaster committed a "significant breach" of broadcasting rules by omitting to mention that the presenter of a film about the Gaza situation was the son of a Hamas official, according to UK media regulator Ofcom.
An inquiry by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has concluded that the programme was "substantially inaccurate".
The head of the BBC had earlier expressed regret, stating there had been "a significant failing in relation to accuracy".
The authority has instructed the BBC to transmit a prime-time declaration about its decisions.
"As this represents a serious breach of our rules, we are directing the BBC to broadcast a message of our determinations against it on BBC2 at nine o'clock in the evening, with a date to be determined," the statement read.
'Potential to Undermine Credibility'
The regulator's statement said: "Our investigation found that the programme's failure to disclose that the voice's parent served in a post in the Hamas-run government was substantially inaccurate.
"This implied that the viewers did not have critical information which may have been highly relevant to their judgment of the narrator and the information he shared.
"Confidence is at the heart of the connection between a media organization and its public, particularly for a public service broadcaster such as the BBC.
"This oversight had the risk to erode the very considerable amounts of trust that the public would have placed in a BBC factual programme about the conflict in Gaza."
The programme was removed from the BBC's streaming service in last February after the presenter's personal associations were revealed, and in this past July an broadcaster's internal assessment determined it infringed the corporation's journalistic standards on accuracy.
A BBC spokesperson said: "The Ofcom ruling is in accordance with the findings of the corporation's inquiry, that there was a significant failing in the documentary in relation to the BBC's Editorial Guidelines on accuracy, which corresponds to regulation 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we agree with the authority's determination in its entirety. We will adhere to the directive as soon as the timing and language are determined."
