After years of treating President Donald Trump’s inflammatory rhetoric with a light touch, Facebook and Instagram are silencing his social media accounts for the rest of his presidency. The move, which many called justified following Wednesday’s insurrection at the U.S. Capitol, is also a somber reminder of the enormous power that social media platforms can exercise when they choose.

Facebook and Instagram said today they will bar Trump from posting at least until the inauguration of President-elect Joe Biden.

In a post announcing the unprecedented move, Facebook founder Mark Zuckerberg said the risk of allowing Trump to use the platform is too great following the president’s incitement of a mob that touched off Wednesday’s deadly riot at the Capitol. Zuckerberg says Trump’s account will be locked “for at least the next two weeks” but could remain locked indefinitely.

“The shocking events of the last 24 hours clearly demonstrate that President Donald Trump intends to use his remaining time in office to undermine the peaceful and lawful transition of power to his elected successor, Joe Biden,” Zuckerberg wrote.

Trump has repeatedly harnessed the power of social media to spread falsehoods about election integrity and the results of the presidential race. Platforms like Facebook have occasionally labeled or even removed some of his posts, but the overall response has failed to satisfy a growing number of critics who say the platforms have enabled the spread of dangerous misinformation.

In light of Wednesday’s riot, however, Zuckerberg said a more aggressive approach is needed.

“The current context is now fundamentally different, involving use of our platform to incite violent insurrection against a democratically elected government,” he wrote.

Instagram, which is owned by Facebook, will also block Trump’s ability to post on its platform “indefinitely and for at least the next two weeks,” Adam Mosseri, the head of Instagram tweeted today.

Twitter also locked President Donald Trump’s accounts for 12 hours after he repeatedly posted false accusations about the integrity of the election. That suspension was set to expire sometime today; the president had not yet resumed tweeting as of late this morning.

A company spokesman said the company could take further action as well.

“We’re continuing to evaluate the situation in real time, including examining activity on the ground and statements made off Twitter,” the spokesman said. “We will keep the public informed, including if further escalation in our enforcement approach is necessary.”

Meanwhile, the platforms continued to face criticism from users who blamed them, in part, for creating an online environment that led to Wednesday’s violence.

“Today is the result of allowing people with hate in their hearts to use platforms that should be used to bring people together,” singer and actress Selena Gomez wrote on Twitter to her 64 million followers. “You have all failed the American people today, and I hope you’re going to fix things moving forward.”

Thomas Rid, a Johns Hopkins cyberconflict scholar, tweeted “kudos and respect” to Zuckerberg and Facebook shortly after the announcement that Trump’s account would be locked for two weeks.

“Clearly the right move,” Rid said. “Consistent incitement to political violence is not acceptable. Twitter should do so as well.”

A message left with the White House this morning was not immediately returned.

The temporary block that Twitter and Facebook implemented Wednesday was the most aggressive action either company has yet taken against Trump, who more than a decade ago embraced the immediacy and scale of Twitter to rally loyalists, castigate enemies and spread false rumors.

Twitter locked Trump out of his account for 12 hours and said that future violations could result in a permanent suspension. The company required the removal of three of Trump’s tweets, including a short video in which he urged those supporters to “go home” while also repeating falsehoods about the integrity of the presidential election. Trump’s account deleted those posts, Twitter said; had they remained, Twitter had threatened to extend his suspension.

While some cheered the platforms’ actions, experts noted that the companies’ actions follow years of hemming and hawing on Trump and his supporters spreading dangerous misinformation and encouraging violence that have contributed to Wednesday’s violence.

Trump posted the video more than two hours after protesters entered the Capitol, interrupting lawmakers meeting in an extraordinary joint session to confirm the Electoral College results and President-elect Joe Biden’s victory.

So far, YouTube has not taken similar action to muzzle Trump, although it said it also removed Trump’s video. But that video remained available as of Wednesday afternoon.

Twitter initially left the video up but blocked people from being able to retweet it or comment on it. Only later in the day did the platform delete it entirely.

Trump opened his video saying, “I know your pain. I know your hurt. But you have to go home now.”

After repeating false claims about voter fraud affecting the election, Trump went on to say: “We can’t play into the hands of these people. We have to have peace. So go home. We love you. You’re very special.”

Republican lawmakers and previous administration officials had begged Trump to give a statement to his supporters to quell the violence. He posted his video as authorities struggled to take control of a chaotic situation at the Capitol that led to the evacuation of lawmakers and the death of at least one person.

In a statement this morning, Trump said there would be an “orderly transition on January 20th” and acknowledged defeat in the election for the first time. His aides posted the statement on Twitter because his account remained suspended.