The BBC engaged in a "major breach" of broadcasting rules by omitting to mention that the voice of a programme about the Gaza conflict was the child of a Hamas official, according to British broadcasting authority Ofcom.
An investigation by Ofcom into the programme Gaza: How to Survive a Warzone has determined that the documentary was "materially misleading".
The chief executive of the broadcaster had previously apologised, saying there had been "a serious error in relation to factual correctness".
Ofcom has ordered the corporation to transmit a prime-time statement about its findings.
"As this represents a serious breach of our regulations, we are directing the corporation to broadcast a message of our conclusions against it on BBC Two at nine o'clock in the evening, with a schedule to be confirmed," the regulator stated.
'Possibility to Damage Trust'
The authority's announcement said: "Our probe determined that the programme's failure to disclose that the narrator's parent occupied a role in the Hamas-run administration was materially misleading.
"Consequently that the public did not have critical information which may have been very significant to their evaluation of the voice and the content he shared.
"Credibility is at the core of the relationship between a media organization and its public, especially for a national broadcasting corporation such as the British Broadcasting Corporation.
"This oversight had the risk to undermine the significantly high amounts of trust that audiences would have put in a factual film from the broadcaster about the Gaza conflict."
The film was removed from the online platform in last February after the presenter's familial connections came to light, and in July an broadcaster's internal assessment determined it infringed the organization's editorial guidelines on truthfulness.
A corporation official commented: "The authority's determination is in line with the conclusions of the internal assessment, that there was a major oversight in the film in relation to the BBC's Editorial Guidelines on accuracy, which corresponds to clause 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we comply with Ofcom's decision in complete. We will adhere to the sanction as soon as the date and language are confirmed."
