Facebook CEO Mark Zuckerberg. Justin Sullivan/Getty Images Mark Zuckerberg still thinks it's "extremely unlikely" that Facebook swayed the presidential election — but he acknowledged that the social networking site has work to do when it comes to hoaxes on the platform.

The Facebook CEO wrote a post on his page Saturday regarding the site's role in this year's election after people began blaming Facebook for allowing fake news to be distributed on the site, perhaps contributing to Donald Trump's surprising victory.

Speaking at the Techonomy conference on Thursday, Zuckerberg initially dismissed the accusations.

"Personally, I think the idea that fake news on Facebook, it's a very small amount of the content, influenced the election in any way is a pretty crazy idea," he said.

But after continued backlash, Zuckerberg took to Facebook to share his thoughts on the site's role in disseminating news, writing that the company will "continue to work on this to improve further" but must do so cautiously in order to avoid bias. Identifying what's true and what's not is "complicated," he said, and even mainstream news can get it wrong sometimes.

Read Zuckerberg's post in full: