United Kingdom, May 8 -- TikTok has accused the US of an "extraordinary intrusion on free speech rights".

The firm hit out in a lawsuit aiming to block an American law that would ban the video app in the country unless it is sold by its Chinese parent company.

In court documents filed with the DC Circuit Court of Appeals, TikTok said the sale requirement was "simply not possible: not commercially, not technologically, not legally. And certainly not on the 270-day timeline required by the Act".

It added the move had unfairly singled out TikTok - creating a "two-tiered speech regime with one set of rules for one named platform, and another set of rules for everyone else".

The social media company said not only was the US move an "extrao...