The Biden administration is threatening a potential ban of TikTok in the United States if its Chinese owners refuse to sell their stakes in the video sharing app, a source close to the company told NBC News on Thursday.

The source, however, cautioned that the company did not see the administration’s move as a final order.

The administration’s demand, first reported by the Wall Street Journal, signals a significant shift in the U.S. stance toward Beijing-based ByteDance Ltd., which owns the popular video sharing app.

The White House and Treasury Department declined to provide comment to NBC News.