The social platform has been under growing pressure to take further action against Trump following Wednesday’s deadly insurrection at the U.S. Capitol. Twitter initially suspended Trump’s account for 12 hours after he posted a video that repeated false claims about election fraud and praised the rioters who stormed the Capitol.

Twitter’s move deprives Trump of a potent tool he has used to communicate directly with the American people for more than a decade. He has used Twitter to announce policy changes, challenge opponents, insult enemies, praise his allies (and himself), and to spread misinformation.

Twitter has long given Trump and other world leaders broad exemptions from its rules against personal attacks, hate speech and other behaviors. But in a lengthy explanation posted on its blog Friday, the company said recent Trump tweets amounted to glorification of violence when read in the context of the Capitol riot and plans circulating online for future armed protests around the inauguration of President-elect Joe Biden.

In those tweets, Trump stated that he will not be attending the inauguration and referred to his supporters as “American Patriots,” saying they will have “a GIANT VOICE long into the future.” Twitter said these statements “are likely to inspire others to replicate the violent acts that took place on January 6, 2021, and that there are multiple indicators that they are being received and understood as encouragement to do so.”