Facebook has blocked about 115 user accounts after US authorities tipped it off to suspicious behaviour that may be linked to a foreign entity, the company says in a blog post, hours before US voters head to the polls.

The social network said it needed to do further analysis to decide if the accounts are linked to Russia’s Internet Research Agency or another group.

The United States has accused the Russian government body of meddling in US politics with social media posts meant to spread misinformation and sow discord.

Eighty five of the removed accounts were posting in English on Facebook’s Instagram service, and 30 more were on Facebook and associated with pages in French and Russian, the post said.

Election Update https://t.co/yXHfJZa29l

— Meta Newsroom (@MetaNewsroom) November 6, 2018

Some accounts “were focused on celebrities” and others on “political debate,” it added.

The tip came from US law enforcement on Sunday night, Nathaniel Gleicher, Facebook’s head of cybersecurity policy, wrote in the post.

The company announced its actions earlier in its investigation than typical “given that we are only one day away from important elections in the US,” he added.

“Americans should be aware that foreign actors, and Russia in particular, continue to try to influence public sentiment and voter perceptions through actions intended to sow discord,” including through social media, federal authorities said in a statement on Monday.

Social media companies say they are now more vigilant against foreign and other potential election interference after finding themselves unprepared to tackle such activity in the US presidential election two years ago.

-AAP