The BBC committed a "serious breach" of industry standards by not revealing that the presenter of a film about Gaza was the son of a Hamas administrator, according to British broadcasting authority Ofcom.
An probe by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has concluded that the film was "significantly deceptive".
The head of the BBC had previously apologised, saying there had been "a serious error in relation to accuracy".
Ofcom has directed the corporation to broadcast a evening announcement about its decisions.
"As this represents a major infringement of our regulations, we are directing the BBC to broadcast a statement of our conclusions against it on BBC Two at nine o'clock in the evening, with a date to be confirmed," it said.
'Possibility to Damage Confidence'
The regulator's announcement said: "Our probe determined that the programme's omission to reveal that the voice's male guardian occupied a position in the Hamas-run government was materially misleading.
"Consequently that the public did not have essential details which may have been highly relevant to their assessment of the presenter and the information he shared.
"Trust is at the core of the bond between a media organization and its audience, particularly for a public service broadcaster such as the public broadcaster.
"This failing had the possibility to damage the very considerable levels of confidence that the public would have put in a factual film from the broadcaster about the Gaza conflict."
The documentary was pulled from iPlayer in February after the presenter's familial connections emerged, and in the month of July an corporation's own inquiry concluded it breached the broadcaster's content policies on factual correctness.
A representative for the broadcaster commented: "The Ofcom ruling is in agreement with the findings 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 the regulator's media standards.
"We have apologised for this and we agree with Ofcom's decision in its entirety. We will comply with the directive as soon as the date and wording are confirmed."
