Complaints focused on BBC journalist Sarah Montague's alleged failure to challenge controversial claims made by Israeli Defense Minister Moshe Ya'alon.
Journalist Amena Saleem, who works with the Palestine Solidarity Campaign (PSC), wrote on Electronic Intifada that she received an email last week from the BBC's Editorial Complaints Unit (ECU) indicating grievances lodged by the PSC would be upheld.
However, a BBC spokesperson said the finding was "provisional" and the outcome was yet to be finalized.
According to a PSC transcript of the interview, broadcast on BBC Radio 4's flagship news program "Today" on March 19, Ya'alon said that Palestinians enjoy political independence.
If the complaint is upheld, it is the second time in recent months the ECU has censured the state-run corporation for its pro-Israel bias.
Complaint against BBC for describing Gaza war as "Israel's security operation" upheld http://t.co/bAi7GShy6P
— Daniel Wickham (@DanielWickham93) May 20, 2015
BBC News Online was found to have breached its editorial guidelines last July when it described the author of an article about Gaza's hidden tunnels as an "independent defense analyst."
The author, Dr Eado Hecht, is a lecturer in military doctrine at Bar Ilan University, an institution described by the ECU as being "explicitly pro-Israeli."
The complaints board also acknowledged the author had "published articles written from a clearly pro-Israeli perspective."
In Montague's interview with Ya'alon, the senior BBC journalist failed to address misleading statements by the Israeli defense minister.
According to a transcript, Ya'alon said Palestinians "enjoy already political independence. They have their own political system, government, parliament, municipalities and so forth. And we are happy with it. We don't want to govern them whatsoever."
Comment: "The result was that the output fell below the BBC's standards of impartiality,"
The BBC is Washington's 'ministry of propaganda - UK branch'
For more examples of 'impartial' reporting from the BBC on Israel / Palestine, see:
Israel's lies go unchallenged on BBC's flagship current affairs show
Israel apologist BBC, facing accusations of bias, admits coverage of Israel/Palestine is "tough"
Hail also to Ken Loach who slams BBC's pro-Israel coverage of Gaza war
'Israel under renewed Hamas attack' says the BBC. More balance is needed
How the BBC whitewashed Israel's war crimes from the ceasefire in Gaza
As Israel assaults Gaza, BBC reporting assaults the truth