Former English Defence League (EDL) leader Tommy Robinson has been suspended from Twitter.
The social network has declined to say how long his account will be taken down for.
It is believed the far-right figure's profile had violated the platform's policies on "hateful conduct" – but it is not known what triggered the suspension.
Robinson, whose real name is Stephen Yaxley-Lennon, is widely seen as an anti-Islam activistand had more than 400,000 followers on the platform.
His supporters have rallied around the hashtag #IAmTommy to protest the suspension.
Robinson, who left the EDL in 2013 but has remained politically active since, was suspended by the platform earlier this month before having his account reactivated. His profile has been suspended multiple times in the past.
The English Defence Leagues official Twitter account has also been suspended before.
A new account listed under the group's name is currently active on Twitter and has about 100 followers.
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Mr Robinson's Facebook page is currently still active.
He was also one of a number of right-wing figures to see his verified status removed in November after Twitter issued new guidelines for "blue tick" accounts in the wake of public pressure.