The BBC committed a "significant breach" of industry standards by not revealing that the presenter of a film about the Gaza conflict was the son of a Hamas official, according to UK media regulator Ofcom.
An probe by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has found that the film was "materially misleading".
The head of the BBC had already issued an apology, saying there had been "a serious error in relation to truthfulness".
Ofcom has instructed the BBC to air a prime-time announcement about its decisions.
"As this represents a major infringement of our rules, we are ordering the broadcaster to transmit a announcement of our findings against it on BBC Two at 21:00, with a date to be finalised," the regulator stated.
'Possibility to Erode Credibility'
The watchdog's report declared: "Our investigation determined that the documentary's failure to disclose that the narrator's father occupied a role in the Hamas-administered administration was materially misleading.
"It meant that the audience did not have essential details which may have been extremely pertinent to their assessment of the voice and the information he provided.
"Confidence is at the core of the bond between a media organization and its public, notably for a state-funded media outlet such as the public broadcaster.
"This oversight had the potential to undermine the exceptionally strong degrees of trust that audiences would have invested in a BBC factual programme about the Gaza conflict."
The documentary was removed from the online platform in February after the presenter's family links emerged, and in the month of July an internal BBC review found it breached the broadcaster's content policies on factual correctness.
A representative for the broadcaster stated: "The authority's determination is in agreement with the results of the corporation's inquiry, that there was a serious error in the programme in relation to the BBC's Editorial Guidelines on truthfulness, which corresponds to Rule 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we comply with the regulator's ruling in full. We will comply with the directive as soon as the timing and wording are determined."
