Twitter has deleted more than 10,000 bot accounts that have been claimed to have tried to persuade Americans not to vote in the upcoming US elections.
Twitter did not give details of what types of messages the bots sent, but according to Reuters, the accounts had posed as democrats and urged important demographics not to vote, arguing, for example, that democratic men should not vote as this would drown the voices of women.
A company spokesperson said it had taken "action on relevant accounts and Twitter activity". It had removed the posts between September and October.
Late on Friday, Twitter confirmed that the Democratic Party, which had set up its own system to detect malicious accounts using technology developed by the University of Indiana, was first alerted to the posts.
Although Twitter has its own spam and bot detection technology and then deletes it, Democrats hope they can respond more quickly by using their own system if false information campaigns spread in the run up to next Tuesday's election.
The Democratic National Committee did not respond to requests for opinion.