Eleven police officers, including a deputy chief of the Shenyang public security bureau, have been prosecuted for acting as "protection umbrellas" for three major gangs in Liaoning province, Beijing News reported yesterday.

One case, involving gang leader Song Pengfei, and seven police officers, concluded on Tuesday.

A second case, headed by Hao Wanchun, and involving four police officers, including deputy chief of the Shenyang public security, Zhang Jianming, ended on June 29.