The BBC engaged in a "serious breach" of industry standards by omitting to mention that the narrator of a programme about the Gaza conflict was the offspring of a Hamas administrator, according to UK media regulator Ofcom.
An inquiry by the media regulator into the documentary titled Gaza: How to Survive a Warzone has found that the programme was "materially misleading".
The head of the BBC had earlier expressed regret, stating there had been "a significant failing in relation to accuracy".
Ofcom has ordered the broadcaster to transmit a evening declaration about its decisions.
"As this represents a serious breach of our regulations, we are ordering the BBC to air a statement of our conclusions against it on BBC2 at nine o'clock in the evening, with a timing to be determined," the statement read.
'Possibility to Damage Confidence'
The authority's report said: "The inquiry we conducted concluded that the programme's failure to disclose that the presenter's father occupied a position in the Hamas-administered government was significantly deceptive.
"This implied that the viewers did not have vital facts which may have been very significant to their evaluation of the narrator and the content he shared.
"Confidence is at the heart of the bond between a broadcaster and its viewers, notably for a public service broadcaster such as the BBC.
"This error had the risk to undermine the exceptionally strong degrees of trust that the public would have placed in a BBC factual programme about the Gaza conflict."
The programme was removed from iPlayer in the month of February after the narrator's family links came to light, and in July an broadcaster's internal assessment determined it breached the corporation's editorial guidelines on truthfulness.
A corporation official stated: "The Ofcom ruling is in line with the findings of Peter Johnston's review, that there was a serious error in the film in relation to the BBC's Editorial Guidelines on accuracy, which reflects Rule 2.2 of the regulator's media standards.
"We issued an apology for this and we agree with the regulator's ruling in full. We will comply with the penalty as soon as the schedule and language are confirmed."
