"But, we are committed to rising to the occasion".
Zuckerberg announced a series of steps that would help prevent the manipulation of the social network including more transparency on political ads appearing on Facebook.
Zuckerberg said the new steps would address these concerns.
"We're going to bring Facebook to an even higher standard of transparency", he said.
Facebook said Thursday it will share more than 3,000 ads linked to Russian Federation with congressional investigators looking into whether the country meddled in the 2016 USA presidential election.
This month, Facebook revealed that fake accounts and pages that likely have ties to Russian Federation spent $100,000 in divisive political ads from June 2015 to May 2017 before the USA presidential election.
"We believe it is vitally important that government authorities have the information they need to deliver to the public a full assessment of what happened in the 2016 election", said Colin Stretch, Facebook's general counsel in a blog post.
"When someone buys political ads on TV or other media, they're required by law to disclose who paid for them".
A total of 470 fake accounts and pages ran roughly 3,000 ads during that period.
An internal Facebook review showed that Russia-linked fake accounts were used to buy ads aimed at exacerbating political clashes ahead of and following the 2016 United States presidential election.
Most of the ads run by the accounts didn't directly reference the USA presidential election, voting, or particular candidates but instead appeared focused on "amplifying divisive social and political messages across the ideological spectrum", according to Stamos.
Facebook previously briefed members of both the House and Senate Intelligence committees on some its findings on Russian interference in the 2016 election on the platform. "That's not what we stand for".
That included working with the USA government on the Russian investigation, allowing users to visit an advertiser's page and see what ads they're running, strengthening the company's review for political ads and other efforts.
Facebook, which has been criticized for not doing enough to combat fake news during the election, also vowed to do more to protect election integrity.
Facebook also wants to figure out ways that internet companies can share more information about attempts to interfere with elections, according to Zuckerberg.
"It is important that technology companies collaborate on this because it is nearly certain that any actor trying to abuse Facebook will try to abuse other online platforms too", Zuckerberg said.