TikTok's logo is displayed on a tablet screen. LIONEL BONAVENTURE | AFP | Getty Images

TikTok has lifted its ban on an American teen who says she was blocked from the platform after sharing a viral video criticizing China's treatment of minority Uighur Muslims. The app claimed that 17-year-old Feroz Aziz was prevented from accessing her account due to association with a separate profile which posted a video including an image of Osama bin Laden. It cited policies on terrorist-related content and said "no China-related content was moderated on this account." Owned by China's ByteDance, TikTok has drawn the attention of U.S. lawmakers who are concerned the company may be censoring politically sensitive content deemed offensive to Beijing. The U.S. government is now looking into ByteDance over concerns that its 2017 acquisition of Musical.ly poses a national security risk. TikTok has also been blasted by Facebook CEO Mark Zuckerberg, who claimed the app censored users posting about pro-democracy protests in Hong Kong. However, TikTok has denied it removes content from the app over "sensitivities around China." China has forced as many as 1 million Muslims into internment camps in the western part of the country, where they undergo indoctrination and interrogation designed to turn them into supporters of the Chinese Communist Party, according to a trove of documents revealed by the New York Times this month.

In a report last year, the United Nations referred to the western Xinjiang region of China as a "no rights zone" where Muslims are treated as "enemies of the state." Beijing says it is fighting religious "extremism."

TikTok's explanation

In a blog post late Wednesday, TikTok detailed a timeline of events which led up to Aziz's ban and the temporary removal of her clip. The firm said she uploaded footage of herself talking about the treatment of Uighurs in China on Nov. 23 using a different TikTok handle. The firm further explained that it locked her out of that new account due to a "scheduled platform-wide enforcement" action. It said moderators banned 2,406 phones associated with accounts that had been blocked due to breaching content guidelines. "Because the user's banned account (@getmefamousplzsir) was associated with the same device as her second account (@getmefamouspartthree), this had the effect of locking her out of being able to access her second, active account from that device," TikTok claimed. "However, the account itself remained active and accessible, with its videos continuing to receive views." The clip in question, which has over 1.5 million views, shows the U.S. teen pretending to do an eyelash curling tutorial, only to then urge other TikTok users to "search up what's happening in China." In the video, Aziz refers to the country's treatment of the Uighur community as "another holocaust."