In the memo, Andrew Bosworth, a Facebook vice president, wrote: "Maybe someone dies in a terrorist attack coordinated on our tools. And still we connect people. The ugly truth is that we believe in connecting people so deeply that anything that allows us to connect more people more often is *de facto* good."

Bosworth and Facebook's chief executive, Mark Zuckerberg, have since disavowed the memo, which was published on Thursday by BuzzFeed News.

But the fallout at the Silicon Valley company has been wide. According to two Facebook employees, workers have been calling on internal message boards for a hunt to find those who leak to the media.

Some have questioned whether Facebook has been transparent enough with its users and with journalists, said the employees, who asked not to be identified for fear of retaliation.

Many are also concerned over what might leak next and are deleting old comments or messages that might come across as controversial or newsworthy, they said.

The brouhaha follows a period of intense scrutiny for Facebook and questions over what its responsibilities are to its more than 2.2 billion users.

The company has been grappling this month with revelations that a British political consulting firm, Cambridge Analytica, improperly harvested data from 50 million of the social network's users. Zuckerberg has since been on an apology tour over data privacy and is expected to testify before lawmakers in Washington.

Facebook did not respond to a request for comment over employees' reaction to the leaked memo.

In the aftermath, some Facebook executives have taken to Twitter for a public charm offensive, sending pithy phrases and emoticons to reporters who cover the company.

Adam Mosseri, Facebook's head of news, in recent days wrote unprompted to a BuzzFeed editor and to its chief executive reminiscing and telling a story about his mother. He also wrote to a reporter from the Verge tech site about the songs played at his wedding reception.

In some of his tweets, Mosseri also defended Facebook. When writers from Vox and BuzzFeed tweeted that they noticed that stories critical of Facebook were receiving surprisingly low levels of traffic on Facebook, Mosseri jumped in.

"We 100% do not take any action on stories for being critical of us," he tweeted.

Bosworth, the author of the 2016 memo, also took to Twitter. Late Thursday, he said he did not agree with what he wrote in the memo "and I didn't agree with it even when I wrote it".

He added that "the purpose of this post, like many others I have written internally, was to bring to the surface issues I felt deserved more discussion with the broader company".

After BuzzFeed published the memo, Bosworth deleted it from an internal message board where it had originally been posted.

In a statement to BuzzFeed, Zuckerberg praised Bosworth as "a talented leader who says many provocative things" and said he and most people at Facebook did not agree with the memo and that the company had realised that it could not just be about connecting people.

Facebook employees said on Friday that discussions were raging across the company regarding the merits of the post. Some called for executives to aggressively pursue action against those leaking to the media, said two Facebook employees, as well as for the company to do more to screen for potential whistleblowers during the hiring process.

At least one former Facebook employee, Alec Muffett, wrote on Twitter that Bosworth's memo was responsible for his decision to leave the company.

"Between overwork and leadership direction evidenced thusly, I could never stay," wrote Muffett, who formerly worked as a Facebook engineer.

"There are some amazing engineers working at Facebook, folks who care deeply about user privacy, security, and how people will use the code that they write."

Muffet said later in a message. "Alas this episode may not help" to achieve more transparent internal product discussion, he said.

Straits Times

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