The BBC committed a "significant breach" of media regulations by omitting to mention that the narrator of a film about the Gaza situation was the child of a Hamas administrator, according to UK media regulator Ofcom.
An investigation by the media regulator into the documentary titled Gaza: How to Survive a Warzone has found that the film was "materially misleading".
The head of the BBC had previously apologised, saying there had been "a major oversight in relation to factual correctness".
The regulator has instructed the BBC to broadcast a evening declaration about its decisions.
"Since this amounts to a significant violation of our rules, we are ordering the broadcaster to transmit a statement of our findings against it on BBC2 at 21:00, with a date to be determined," the regulator stated.
'Potential to Erode Credibility'
The authority's report stated: "The inquiry we conducted concluded that the documentary's failure to disclose that the presenter's parent served in a role in the Hamas-run authority was significantly deceptive.
"This implied that the audience did not have essential details which may have been highly relevant to their evaluation of the narrator and the content he provided.
"Trust is at the heart of the relationship between a broadcaster and its viewers, notably for a national broadcasting corporation such as the public broadcaster.
"This oversight had the risk to damage the significantly high degrees of credibility that the public would have placed in a BBC factual programme about the Israel-Gaza war."
The programme was withdrawn from iPlayer in last February after the presenter's familial connections came to light, and in the month of July an internal BBC review found it breached the organization's journalistic standards on accuracy.
A corporation official said: "The regulator's decision is in agreement with the results of Peter Johnston's review, that there was a significant failing in the programme in relation to the BBC's Editorial Guidelines on factual correctness, which reflects Rule 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we agree with Ofcom's decision in its entirety. We will comply with the sanction as soon as the date and wording are finalised."
