The 25-year-old Rockets supporter, named by police as Wang, posted a picture of him holding a lighter and a small Chinese national flag on social media.

Wang, a musician, also wore an eye-patch in the picture, prompting speculation that he was a supporter of the anti-Beijing movement in Hong Kong.

Eye-patches have been one of the props used by pro-democracy activists after one demonstrator was hit in the eye by police with a round of bean bag in a rally in August.