At around 9pm, Three Rioters have thrown 3 petrol bombs at the civilian roads directly in front of the Kwai Chung Police station.

The rioters attacked the Police station with no warning, they fled after throwing the petrol bombs. Luckily no one was injured in the incident.

Earlier that day at 4 am, rioters have thrown multiple petrol bombs at the Tin Shui Wai Police Station as well. (Source)

Source:

https://hk.on.cc/hk/bkn/cnt/news/20200129/bkn-20200129202324664-0129_00822_001.html