Some strikes from 2009 onward have involved police intervention and the use of riot control measures, as well as violence on the part of some strikers.
Their responsibilities included crowd control, riot control, and provision of assistance during natural calamities such as fires and floods, thus three specially-trained squads were formed.
The program includes research, production, stockpiling and weaponisation of large quantities of chemical agents (perhaps as many as 5000 tons), including blister, nerve, choking, psychoincapacitant, vomiting and riot control agents.