GUANGZHOU - Investigators have cracked an online copyright-infringement case involving the software giant Microsoft, police here said on Tuesday.

Economic-crimes investigators received a complaint from Microsoft alleging that a host of various websites in Zhaoqing, a city in Guangdong province, had infringed on one of the company's copyrights. In response, officials established a task force in August, according to He Guangping, deputy head of the Guangdong provincial department of public security.

Investigators found the server for those websites, the most famous of which is jujumao.cn, in Zhaoqing.