The BBC was found to have committed a "significant breach" of broadcasting rules by omitting to mention that the voice of a film about the Gaza situation was the son of a Hamas administrator, according to regulatory body Ofcom.
An investigation by the media regulator into the documentary titled Gaza: How to Survive a Warzone has concluded that the documentary was "significantly deceptive".
The BBC's director general had earlier expressed regret, stating there had been "a significant failing in relation to accuracy".
The regulator has directed the broadcaster to broadcast a evening statement about its decisions.
"Since this amounts to a significant violation of our code, we are instructing the broadcaster to transmit a statement of our findings against it on BBC Two at 9pm, with a timing to be determined," the regulator stated.
'Potential to Erode Credibility'
The authority's announcement stated: "The inquiry we conducted determined that the documentary's failure to disclose that the presenter's parent occupied a post in the Hamas-administered administration was materially misleading.
"It meant that the viewers did not have vital facts which may have been highly relevant to their evaluation of the voice and the details he provided.
"Trust is at the core of the bond between a broadcaster and its public, particularly for a public service broadcaster such as the BBC.
"This oversight had the possibility to erode the very considerable levels of credibility that the public would have placed in a factual film from the broadcaster about the Gaza conflict."
The programme was removed from the BBC's streaming service in the month of February after the presenter's personal associations were revealed, and in the month of July an broadcaster's internal assessment determined it infringed the corporation's editorial guidelines on factual correctness.
A BBC spokesperson said: "The regulator's decision 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 factual correctness, which reflects Rule 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 schedule and wording are finalised."
