TikTok will live on for at least another three months in the United States, as President Donald Trump is poised to extend a sale or ban deadline for the third time since taking office this year.

"President Trump will sign an additional Executive Order this week to keep TikTok up and running," White House Press Secretary Karoline Leavitt said on Tuesday.

The popular video sharing app was supposed to be banned in the US after its Chinese owner, ByteDance, refused to sell it to a US buyer by a January deadline.

TikTok and ByteDance did not immediately respond to requests for comment from the BBC.

Leavitt said the 90-day extension would "ensure this deal is closed so that the American people can continue to use TikTok with the assurance that their data is safe and secure."