The security forces were called in to restore law and order only when the mob became unruly and provocative and the situation got out of hand, posing a challenge to the peace and stability of the nation.
只有当暴民无法无天，寻衅闹事，局势失去控制并对国家和平与稳定构成威胁时，才调入安全部队恢复法律和秩序。