The BBC committed a "significant breach" of media regulations by failing to disclose that the narrator of a film about Gaza was the offspring of a Hamas representative, according to regulatory body Ofcom.
An investigation by Ofcom into the documentary titled Gaza: How to Survive a Warzone has found that the programme was "substantially inaccurate".
The chief executive of the broadcaster had earlier expressed regret, saying there had been "a significant failing in relation to accuracy".
The authority has directed the BBC to transmit a evening statement about its decisions.
"Given this constitutes a significant violation of our rules, we are ordering the broadcaster to broadcast a statement of our conclusions against it on BBC Two at nine o'clock in the evening, with a timing to be determined," it said.
'Possibility to Erode Confidence'
The authority's announcement stated: "Our probe concluded that the film's omission to reveal that the presenter's father occupied a post in the Hamas-run administration was substantially inaccurate.
"Consequently that the public did not have essential details which may have been highly relevant to their evaluation of the presenter and the information he shared.
"Trust is at the core of the connection between a media organization and its viewers, particularly for a public service broadcaster such as the BBC.
"This error had the potential to damage the exceptionally strong degrees of credibility that the public would have placed in a documentary produced by the BBC about the Israel-Gaza war."
The programme was pulled from iPlayer in the month of February after the boy's familial connections were revealed, and in the month of July an broadcaster's internal assessment determined it infringed the organization's editorial guidelines on accuracy.
A BBC spokesperson said: "The regulator's decision is in agreement with the conclusions of the internal assessment, that there was a significant failing in the documentary in relation to the BBC's Editorial Guidelines on accuracy, which reflects 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 adhere to the sanction as soon as the date and language are finalised."
