To obtain a warrant, experts say Mueller would have needed to prove he has a reasonable suspicion a crime was committed.
Twitter Inc was expected to brief USA congressional investigators soon on whether Russian Federation used its advertising platform to promote divisive social and political messages, a US senator said last week. That surpassed the level of information Facebook told Congress last week.
Special Counsel Bob Mueller's investigation into Russian meddling in the 2016 election has obtained a warrant to investigate Facebook's role in spreading Russian misinformation to targeted USA regions.
As CNN reported Thursday, Facebook is still not sure whether pro-Kremlin groups may have made other ad buys meant to influence American politics that it simply hasn't discovered yet.
Some lawmakers were unhappy with the lack of information divulged by Facebook. Sen.
Internet finance body suggests tougher regulations for virtual currencies
The cryptocurrency dropped 9.3 per cent to US$3,077.55 yesterday morning in London, extending this week's decline to 28 per cent. Morgan Chase CEO Jamie Dimon called the cryptocurrency a fraud that was "worse than the tulip bulbs" and that "won't end well".
Facebook recently revealed bogus Russian-linked accounts bought $100,000 worth of politically charged ads on its site.
On Saturday, Mariotti said, the Facebook search warrant "means that Mueller has concluded that specific foreign individuals committed a crime by making a "contribution" in connection with an election". Mark Warner, D-Va., who's on the Senate Intelligence Committee, suggested the committee may call Facebook, Twitter and other social media companies in for more information. "To justify forcing FB to give up the info". Facebook said approximately one-quarter of the ads were geographically targeted and ran mostly in 2015 rather than 2016.
A former Federal Bureau of Investigation counterintelligence agent, Asha Rangappa said, "This is big news - and potentially bad news for the Russian election interference 'deniers'".
"We have shared our findings with USA authorities investigating these issues, and we will continue to work with them as necessary", Facebook Chief Security Officer Alex Stamos said in a post last week.
Some were circulated before the election and mentioned candidates Clinton and Trump by name.
The company also listed out steps it has implemented towards curbing fake accounts and stories on the platform.