Twitter Inc. said it is permanently suspending President Trump’s personal account, citing the risk of further incitement of violence in the wake of this week’s attack on the U.S. Capitol by a mob of his followers.

The announcement Friday came two days after the social-media platform, one of Mr. Trump’s main tools for communicating publicly, temporarily halted his ability to post for violating its policies, saying further violations could lead to a permanent ban. Mr. Trump’s access then resumed on Thursday.

“After close review of recent Tweets from the @realDonaldTrump account and the context around them—specifically how they are being received and interpreted on and off Twitter—we have permanently suspended the account due to the risk of further incitement of violence,” Twitter said in a blog post.

The White House didn’t immediately respond to a request for comment on the suspension.

In a tweet, Jason Miller, a senior adviser to Mr. Trump’s campaign, called Twitter’s move “disgusting,” adding “Big Tech wants to cancel all 75M @realDonaldTrump supporters.”