TikTok went dark for users across the U.S. late Saturday as the app notified users of a ban that went into effect just days before President-elect Trump's inauguration.

Social media app TikTok stopped working across the US late on Saturday ahead of a new ban as Donald Trump hints at an announcement on the app’s future after he takes office. Trump said he would “most likely” give TikTok a 90-day reprieve from the ban after his inauguration.

As a last resort, the platform is preparing for a total shutdown Sunday, the day a U.S. ban is set to go into effect if the Supreme Court doesn’t overrule it.