Twitter is blocking the right-wing conspiracy theorist Alex Jones from posting to its platform for a week.
The InfoWars broadcaster’s past tweets will, however, remain viewable to others while his account is locked in a “read-only” mode.
The social network has not confirmed what prompted the action.
But the New York Times reported Mr Jones had tweeted a link to a video in which he called on his followers to ready their “battle rifles”.
The newspaper said that Twitter had judged this to be a violation of its rules against inciting violence.
Mr Jones has previously been widely criticised for repeating claims that the 9/11 attacks in New York were staged by the US government.
He has also claimed that many of children killed in the 2012 Sandy Hook massacre were actors. The parents of two children shot in that attack are suing him for defamation, saying he had made “false, cruel, and dangerous assertions”.
Apple’s iTunes, Facebook and YouTube removed podcasts and other content by Mr Jones and InfoWars from their services last week.
Other tech firms have since taken similar action, including the video site Vimeo, and the audio-streaming services Spotify and TuneIn.
However, Twitter had resisted imposing a similar ban.
It said Mr Jones’ accounts had not breached its rules, although CNN later highlighted past tweets that appeared to contradict this.
The social network did, however, promise to take action if there were ever any fresh infractions.
Techcrunch has reported that, according to the terms of the suspension, Mr Jones will still be able to use his account to view and search for other people’s content, but he will not be able to tweet, like, comment or retweet material.
In addition, it said, he has been required to delete the link to his earlier Periscope video session.
Among the last messages Mr Jones posted before the ban came into effect was a claim that InfoWars’ main site had been forced offline by a cyber-attack.