Along with the videos themselves, Facebook reportedly handed over more details about the accounts that bought the ads and the criteria they used to target Facebook users.
Facebook didn't share that data with Congress partly amid concerns it might disrupt the Mueller probe and due to US privacy laws, the people said, according to the report.
Representatives of Facebook previously told congressional investigators that, during the course of an investigation into the site's role in the 2016 election, it had discovered that a Kremlin-linked firm had bought $100,000 of ads between 2015 and 2017.
Facebook didn't share the same information with Congress partly because of concerns of disrupting the special counsel's investigation and because of US privacy laws. "I called somebody who works for one of the technology companies that I work with, and I had them give me a tutorial on how to use Facebook micro-targeting", Kushner told Steven Bertoni of Forbes.
Some lawmakers were unhappy with the lack of information divulged by Facebook. Sen.
The company has not been called to testify in the Russian Federation probe, the Journal reported.
"This is big news", said former Federal Bureau of Investigation counterintelligence agent Asha Rangappa, "and potentially bad news for the Russian election interference 'deniers'".
It also means that Mueller is no longer looking at Russia's election interference from a strict counterintelligence standpoint - rather, he now believes he may be able to obtain enough evidence to charge specific foreign entities with a crime. "To justify forcing FB to give up the info".More news: Two Russian subs attack Islamic State in Syria with Kalibr cruise missiles
"That means that he has uncovered a great deal of evidence through other avenues of Russian election interference", she said.
Former FBI Director Mueller was appointed by the Department of Justice to investigate Russian interference in the US election.
The ads and accounts appeared to focus on amplifying divisive social and political messages across the ideological spectrum, touching on topics from LGBT matters to race issues to immigration to gun rights, the social networking giant had earlier said.
The announcement came about two months after Facebook said it had no evidence of Russian ad purchases.
Some were circulated before the election and mentioned candidates Clinton and Trump by name.
Facebook said it is cooperating with investigators and declined to comment further.
Warner wants a public hearing to force Facebook to account for what happened on its platform during the election, and has been frustrated at the company's disclosures to date.
"It is a crime to know that a crime is taking place and to help it succeed".