rioting       
noun [ U ] uk/ˈraɪ.ə.tɪŋ/ us/ˈraɪ.ə.t̬ɪŋ/
 暴乱;骚动
noisy, violent, and uncontrolled behaviour by a group of people in a public place, often as a protest
  The government is afraid of further serious rioting today. 政府担心今天会发生更严重的骚乱。 
 Rioting broke out when the election results were announced. 公布选举结果时爆发了骚乱。 
 See: riot
 - More examples
 - anti-government rioting
 - The rioting began after two youths on a motorbike died in a collision with a police car.
 - The controversy provoked widespread rioting in the city.