The BBC was found to have committed a "major breach" of media regulations by failing to disclose that the narrator of a film about Gaza was the son of a Hamas administrator, according to regulatory body Ofcom.
An probe by the media regulator into Gaza: How to Survive a Warzone has found that the documentary was "substantially inaccurate".
The chief executive of the broadcaster had earlier expressed regret, stating there had been "a major oversight in relation to factual correctness".
The regulator has instructed the corporation to air a evening statement about its findings.
"Given this constitutes a significant violation of our regulations, we are instructing the broadcaster to transmit a announcement of our findings against it on the BBC's second channel at nine o'clock in the evening, with a schedule to be finalised," it said.
'Risk to Erode Trust'
The regulator's announcement declared: "Our investigation determined that the documentary's failure to disclose that the voice's father served in a role in the Hamas-run authority was materially misleading.
"This implied that the viewers did not have vital facts which may have been extremely pertinent to their evaluation of the voice and the information he presented.
"Trust is at the heart of the bond between a broadcaster and its public, particularly for a state-funded media outlet such as the British Broadcasting Corporation.
"This error had the risk to undermine the exceptionally strong degrees of trust that audiences would have put in a documentary produced by the BBC about the Gaza conflict."
The programme was removed from the online platform in the month of February after the presenter's personal associations emerged, and in the month of July an broadcaster's internal assessment concluded it violated the corporation's editorial guidelines on truthfulness.
A representative for the broadcaster said: "The regulator's decision is in agreement with the conclusions of the internal assessment, that there was a major oversight in the film in relation to the BBC's Editorial Guidelines on accuracy, which reflects clause 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we agree with the regulator's ruling in full. We will comply with the directive as soon as the schedule and wording are confirmed."
