Twitch, which is owned by Amazon (AMZN), is no longer accessible to users inside China. It has also disappeared from Apple's (AAPL) iOS App Store in China.
A spokesman for Twitch confirmed Friday that the service, which lets users watch and broadcast video-game playing, had been blocked in China but wouldn't comment further. The country's internet regulator, the Cyberspace Administration of China, didn't immediately respond to a request for comment.
The move comes after the streaming service became the third most popular free app in the Chinese iOS store, according to analytics firm App Annie.
That surge in popularity resulted from Chinese eSports fans using Twitch to watch their country compete in the Asian Games last month, which was the first time the event had featured competitive video gaming. According to Hong Kong-based tech news site Abacus, Chinese fans were annoyed that state-run TV wasn't covering the event and turned to Twitch in droves.!