BEIJING, Dec. 28 -- China's National Anti-Pornography and Anti-Illegal Publications Office published on Monday 24 typical cases in which pornography was distributed via mobile apps.

Mobile apps are used to disseminate pornographic materials through messaging platforms such as video-sharing app Weipai, and instant messaging services mobile QQ and WeChat, according to the office.

A total of 130 suspects were caught, and the crackdown has cleaned up the online environment, the authority said.

An official with the office said the 24 cases are typical of the cases uncovered in a 2015 campaign to clean the Internet, adding that mobile Internet pornography is increasing and seriously harming the mental health of minors.

The office hopes the public can offer tips regarding offenses and help protect a clean online environment.