PALO ALTO (REUTERS) - Facebook chief executive Mark Zuckerberg told an all-staff meeting on Thursday (Nov 12) that former Trump White House adviser Steve Bannon had not violated enough of the company's policies to justify his suspension when he urged the beheading of two senior US officials, according to a recording heard by Reuters.

Mr Zuckerberg acknowledged criticism of Facebook by President-elect Joe Biden but said the company shared some of the Biden team's concerns about social media. He urged employees not to jump to conclusions about how the new administration might approach regulation of social media companies.

Mr Bannon suggested in a video posted on Nov 5 that FBI director Christopher Wray and government infectious diseases expert Anthony Fauci should be beheaded, saying they had been disloyal to US President Donald Trump, who last week lost his re-election bid to Mr Biden.

"I'd put the heads on pikes. Right. I'd put them at the two corners of the White House as a warning to federal bureaucrats. You either get with the programme or you are gone," Mr Bannon said in the video.

Facebook removed the video but left up Mr Bannon's page, which has about 175,000 followers. Twitter banned him last week over the same content.

"We have specific rules around how many times you need to violate certain policies before we will deactivate your account completely," Mr Zuckerberg said. "While the offences here, I think, came close to crossing that line, they clearly did not cross the line."

Facebook spokesman Andy Stone said the company would take further action against Mr Bannon's page "if there are additional violations".

A Bannon spokesman said his comments were "clearly meant metaphorically" and alluded to a reference Mr Bannon had made the day prior to the treason trial of Thomas More in Tudor England "for rhetorical purposes".

"Mr Bannon did not, would not and has never called for violence of any kind," spokesman Alexandra Preate said in a statement.

Last Friday, Facebook took down a network of other Bannon-linked pages that were pushing false claims about the presidential election, after they were flagged to the world's biggest social media company by activist group Avaaz.

Avaaz said seven of the largest pages had amassed nearly 2.5 million followers. Mr Stone said Facebook had removed "several clusters of activity for using inauthentic behavior tactics to artificially boost how many people saw their content".

Mr Zuckerberg spoke on the issue at a weekly forum with Facebook employees where he is sometimes asked to defend content and policy decisions. A staff member had asked why Mr Bannon had not been banned.

Another employee asked how the company was handling criticism of Facebook by Mr Biden and members of his team. Mr Biden told The New York Times in December last year that he had "never been a fan of Facebook" and considered Mr Zuckerberg "a real problem".

The incoming administration was "not monolithic", Mr Zuckerberg said.

"Just because some people might talk in a way that's more antagonistic to us, it doesn't necessarily mean that speaks for what the whole group or whole administration is going to stand for."

Mr Bannon was arrested in August and has pleaded not guilty to charges of defrauding hundreds of thousands of donors to the US$25 million (S$34 million) "We Build the Wall" campaign. Mr Bannon has dismissed the charges as politically motivated.

As Mr Trump's chief White House strategist, Mr Bannon helped articulate Mr Trump's "America First" policy. Mr Trump fired him in August 2017, ending Mr Bannon's turbulent tenure.