The Chinese owner of video-sharing service TikTok is undergoing a national security review of its purchase of the Musical.ly app.
ByteDance bought Musical.ly for 773 million pounds in 2017.
Quoting unnamed sources, Reuters said the deal was being probed because it had not been cleared by a US body that scrutinises acquisitions.
The investigations come amid growing US suspicion of Chinese tech firms’ activity.
The social music app claimed to have 60 million active users a month at the time of the acquisition.
TikTok has rebuffed the claims of Chinese government interference over content and said it "does not remove content" based on Chinese sensitivities.
Source: BBC News
