Facebook has said upwards of 126 million American clients may have seen content transferred by Russia-based agents in the course of recent years.
The person to person communication site said in regards to 80,000 posts were created previously, then after the fact the 2016 presidential race.
The vast majority of the posts concentrated on disruptive social and political messages.
Facebook discharged the figures in front of a Senate hearing where it - together with Twitter and Google - will detail Russia's effect on the famous locales.
Russia has over and over denied claims that it endeavored to impact the last US presidential race, in which Donald Trump beat Hillary Clinton.
In a different significant improvement on Monday, an examination by autonomous insight Robert Mueller into conceivable conspiracy between the Trump battle and Russia delivered its initially charges against two previous associates. It additionally developed that a third previous assistant had confessed toward the beginning of October to misleading the FBI.
President Trump has expelled affirmations of agreement with Moscow, and has over and over approached Mrs Clinton to be examined.
Facebook reveals 'Russian-supported' falsehood crusade
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The most recent figures discharged by Facebook have been seen by Reuters news organization and the Washington Post daily paper.
The 80,000 posts were distributed between June 2015 and August 2017.
Facebook said they were posted by a Russian organization connected to the Kremlin.
"These activities run counter to Facebook's central goal of building group and all that we remain for," composed Facebook's general direction Colin Stretch, Reuters reports.
"What's more, we are resolved to do all that we can to address this new danger."
Key recent developments:
Nov 2016: Facebook author Mark Zuckerberg says "the possibility that phony news on Facebook impacted the (US) decision in any capacity is an entirely insane thought"
Nov 2016: Zuckerberg says just a "little sum" of substance on Facebook is fabrication news
Aug 2017: Facebook says it will battle counterfeit news by sending more speculated scam stories to truth checkers and distributing their discoveries on the web
Sept 2017: The US Senate Intelligence Committee scrutinizes Twitter for offering an "insufficient" appearance in briefings on asserted Russian impedance
Oct 2017: Google discovers prove that Russian specialists burned through countless dollars on promotions in an offer to influence the decision, media reports say
Oct 2017: Facebook says it will give subtle elements of more than 3,000 adverts it says were purchased in Russia around the season of the race
Oct 2017: Twitter bans Russia's RT and Sputnik media outlets from purchasing promoting in the midst of fears they endeavored to meddle in the race
On Monday, Google likewise uncovered that Russian trolls transferred more than 1,000 recordings on YouTube on 18 distinct channels, as indicated by the Washington Post.
In the interim, Twitter found and suspended every one of the 2,752 records that it had followed to Russia-based Internet Research Agency, a source acquainted with the organization's composed declaration was cited as saying by Reuters.
Getting short shrift
Dave Lee, BBC innovation columnist, San Francisco
It's very amazing how this issue, expelled a little more than a year back by Mark Zuckerberg as "insane" talk, has detonated into an emergency at the world's greatest informal organization.
Evidently not gaining from that slip-up, we comprehend that the push of Facebook's message to different government panels this week will be that only one out of 23,000 or so messages shared on the system were from the Russians.
It ought not amaze Facebook if such an announcement - an architect's barrier, you may state - gets short shrift from a board officially unsatisfied with some of what it's gotten notification from the organizations up until now.
You won't see Mark Zuckerberg, Twitter CEO Jack Dorsey or Google's officials noting questions this week. That activity will be surrendered over to their attorneys.
You think about to what extent tech's extraordinary and effective can escape with not expressly going to bat for the organizations they fabricated.
Take after Dave on Twitter @DaveLeeBBC
In the mean time, the White House on Monday tried to make light of the capture of President Trump's previous crusade administrator, Paul Manafort, and assistant Rick Gates on illegal tax avoidance charges irrelevant to the 2016 battle.
Another of Mr Trump's crusade consultants, George Papadopoulos, confessed to deceiving the FBI over his contacts with Russia in the primary such arraignments by Robert Mueller's extraordinary advice examining asserted connections between his battle and Moscow.
White House representative Sarah Sanders said Mr Papadopoulos had been working in a "volunteer position" and "no action was done in an official limit".
Investigators say Mr Papadopoulos' case can possibly harm the US pioneer, and that he may have been helping Mr Mueller's request since his capture in July - which was not made open until Monday.
Why Papadopoulo capture is critical to the baffle
Manafort: The man who helped Trump win
What are the charges in Mr Mueller's investigation?
Previous Trump battle chief Paul Manafort and business relate Rick Gates both deny 12 charges, including connivance to launder cash and trick against the US
They are charged to have shrouded a large number of dollars in profit gained from Ukrainian government official Viktor Yanukovych and his star Russia party
Both Mr Manafort and Mr Gates are right now under house capture, on safeguard of $10m and $5m individually
Previous outside approach consultant George Papadopoulos confessed to misleading the FBI about the planning of gatherings with claimed go-betweens for Russia
He admitted to dishonestly guaranteeing he had met two figures, including a London-based teacher who was putting forth "earth" on Hillary Clinton, before joining the Trump crusade when in actuality he met them a short time later
Russia-Trump's: who in the show to end all dramatizations?
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