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(CNN Business) —  

One of China’s biggest social media companies has run into trouble in India.

TikTok, a video-sharing app with more than half a billion users worldwide, has been blocked after a court ruled it could expose children to inappropriate content.

The app, which is hugely popular among teenagers, was unavailable to download from Apple (AAPL) and Google (GOOGL) on Wednesday. The companies removed it from their app stores late Tuesday, people familiar with the matter told CNN Business.

The move does not affect tens of millions of existing users in India but it could become a huge setback for TikTok owner Bytedance if it prevents further expansion in the fastest growing market in the world.

The Indian government reportedly asked Apple and Google to block TikTok after a high court in Madras, southern India, ruled on April 3 that it could expose children to sexual predators, pornographic content and cyberbullying.

India’s technology ministry did not immediately respond to a request for comment.

A spokesperson for Google said the company does not comment on individual apps, while Apple