The federal government on Friday told election officials in 21 states that hackers targeted their systems before last year's presidential election.
A Russian media group with links to the Moscow government spent $274,000 in 2016 on Twitter ads which may have been used to try to influence the US election, the social media firm said Thursday.
The problems keep piling up for Facebook, and it's unclear how long the internet giant will be able to brush them aside as it barrels toward acquiring its next billion users.
Google has found evidence its platforms were exploited by Russian operatives seeking to interfere in the 2016 US presidential election, The Washington Post reported on Monday.
Facebook chief Mark Zuckerberg fired back at US President Donald Trump on Wednesday after he accused the leading social network of being "always anti-Trump."
Facebook announced Monday that it is planning more measures to increase transparency in advertising as the company provides Congress with more than 3,000 ads linked to a Russian ad agency.
Are voters in new democracies so disenchanted with the political process that more and more are staying away from the polls?
Facebook on Monday said it will hire more than 1,000 people to thwart deceptive ads crafted to knock elections off course.
After people vote, do they think they made the right choice? When they abstain, do they regret not voting?
Facebook's number two executive Sheryl Sandberg said Thursday the company supports the decision to release the contents and targets of Russia-backed political ads on the social network in the 2016 election.