The BBC was found to have committed a "significant breach" of broadcasting rules by omitting to mention that the presenter of a programme about Gaza was the child of a Hamas official, according to British broadcasting authority Ofcom.
An inquiry by Ofcom into the documentary titled Gaza: How to Survive a Warzone has determined that the documentary was "significantly deceptive".
The chief executive of the broadcaster had earlier expressed regret, saying there had been "a serious error in relation to factual correctness".
The authority has directed the corporation to air a prime-time declaration about its decisions.
"Since this amounts to a major infringement of our regulations, we are directing the BBC to air a announcement of our conclusions against it on the BBC's second channel at 9pm, with a timing to be confirmed," it said.
'Risk to Undermine Credibility'
The watchdog's statement said: "Our investigation determined that the programme's lack of disclosure that the presenter's male guardian occupied a position in the Hamas-run administration was substantially inaccurate.
"It meant that the public did not have essential details which may have been extremely pertinent to their assessment of the narrator and the details he provided.
"Credibility is at the core of the connection between a broadcaster and its audience, especially for a national broadcasting corporation such as the public broadcaster.
"This failing had the risk to damage the very considerable levels of credibility that the public would have put in a factual film from the broadcaster about the Gaza conflict."
The film was removed from the BBC's streaming service in the month of February after the boy's personal associations were revealed, and in this past July an corporation's own inquiry found it violated the broadcaster's content policies on accuracy.
A BBC spokesperson commented: "The Ofcom ruling is in agreement with the conclusions of the internal assessment, that there was a serious error in the programme in relation to the corporation's content standards on truthfulness, which reflects regulation 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we accept the regulator's ruling in its entirety. We will comply with the penalty as soon as the date and wording are finalised."
