The BBC was found to have committed a "serious breach" of industry standards by failing to disclose that the narrator of a programme about the Gaza situation was the son of a Hamas representative, as determined by regulatory body Ofcom.
An inquiry by the media regulator into the programme Gaza: How to Survive a Warzone has found that the documentary was "materially misleading".
The chief executive of the broadcaster had already issued an apology, saying there had been "a significant failing in relation to factual correctness".
The regulator has directed the BBC to broadcast a evening statement about its findings.
"As this represents a major infringement of our regulations, we are directing the BBC to broadcast a message of our findings against it on BBC2 at nine o'clock in the evening, with a date to be finalised," it said.
'Potential to Damage Credibility'
The authority's statement declared: "Our investigation concluded that the programme's failure to disclose that the voice's male guardian held a role in the Hamas-controlled government was significantly deceptive.
"It meant that the viewers did not have critical information which may have been extremely pertinent to their assessment of the presenter and the details he shared.
"Confidence is at the heart of the bond between a television network and its audience, especially for a state-funded media outlet such as the BBC.
"This failing had the possibility to damage the very considerable degrees of credibility that viewers would have invested in a documentary produced by the BBC about the Israel-Gaza war."
The documentary was pulled from the online platform in last February after the presenter's personal associations emerged, and in this past July an corporation's own inquiry found it breached the organization's journalistic standards on truthfulness.
A BBC spokesperson commented: "The Ofcom ruling is in agreement with the conclusions of the internal assessment, that there was a serious error in the programme in relation to the broadcaster's journalistic policies on accuracy, which reflects regulation 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we accept the regulator's ruling in its entirety. We will comply with the sanction as soon as the timing and language are finalised."
