Nitithorn Lamlua and Uthai Yodmanee, two STR leaders) led the protesters to march from the Chamai Maruchet at 10:20 am.
Police closed the front gate of the Royal Thai Police and guarded it.
STR spokesman Amorn Amornratananon said the rally was held to call on Police chief Pol Gen Adul Saengsingkaew to speed up the cases of violent attacks against demonstrators.
The Nation