After the Supreme Court and Biden administration declined to step in, TikTok shut down its app on Saturday night. Trump says he'll issue an executive order to delay its implementation.

The company said TikTok was coming back online in the U.S. after President-elect Donald Trump provided assurances to its service providers.

Some users saw the social media app come back online on Sunday, following a shutdown when a federal law went into effect requiring a sale or ban.