The BBC engaged in a "serious breach" of broadcasting rules by failing to disclose that the narrator of a documentary about the Gaza situation was the child of a Hamas official, according to UK media regulator Ofcom.
An probe by Ofcom into the programme Gaza: How to Survive a Warzone has found that the programme was "materially misleading".
The head of the BBC had earlier expressed regret, saying there had been "a major oversight in relation to truthfulness".
Ofcom has ordered the corporation to broadcast a evening announcement about its findings.
"Given this constitutes a serious breach of our rules, we are instructing the broadcaster to broadcast a statement of our determinations against it on BBC2 at nine o'clock in the evening, with a date to be determined," the statement read.
'Possibility to Erode Confidence'
The regulator's report declared: "The inquiry we conducted found that the programme's failure to disclose that the voice's father occupied a role in the Hamas-controlled government was significantly deceptive.
"It meant that the public did not have critical information which may have been extremely pertinent to their evaluation of the presenter and the information he presented.
"Trust is at the heart of the relationship between a media organization and its audience, particularly for a national broadcasting corporation such as the public broadcaster.
"This oversight had the possibility to erode the significantly high amounts of trust that viewers would have put in a documentary produced by the BBC about the Gaza conflict."
The documentary was removed from iPlayer in February after the presenter's personal associations emerged, and in the month of July an corporation's own inquiry determined it violated the corporation's editorial guidelines on accuracy.
A corporation official stated: "The Ofcom ruling is in accordance with the conclusions of the internal assessment, that there was a significant failing in the programme in relation to the BBC's Editorial Guidelines on truthfulness, which corresponds to Rule 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we accept the authority's determination in its entirety. We will comply with the sanction as soon as the timing and language are confirmed."
